I have these games on Steam and actually it has the floppy, Collector's cd-rom and Windows versions, as far as I can tell there aren't any differences between the Steam and Gog versions.

The last winter sale lasted about two weeks. If you really need much more time than that, I don't know what to tell you.
Also, GOG indeed has at least one "basic" sale every week that there's not a more substantial one; generally, it's unheard of for there to be literally nothing discounted. Hell, in some past years (like 2016), they strung so many consecutive sales together in the last few months of the year that it felt like one continuous sale -- and some people complained!
Their sale frequency is fine. If you want to avail yourself of those discounts, subscribe to e-mail notifications, maybe follow them on Facebook or Twitter if you use one of those.

With regards to prices: publishers have the final say. You can bet if a title's not selling as well as they'd like after some months at a given price point, they'll consider lowering the price; but for long-out-of-print games seeing digital distribution for the first time -- especially if they were as highly sought-after as the likes of TIE Fighter -- you better believe plenty of people will throw $10 at their computer screen the instant they see that game on the front page of GOG (or Steam).

One last thing I'll point out, too: the biggest discounts don't necessarily happen during the biggest sales. ;)

Look man, I'm a lot like you. I only tend to buy games that have a 70-80% (or greater) discount. I recently graduated from college and I can't afford to spend much on games. But as others have said, there's usually a sale around the corner that ends up making me very happy. And yes, I've missed my fair share of sales and regretted it afterward. I just had to shrug it off and be patient for a while - and it's really paid off. I'm the type of guy who likes to complain a lot, but GOG has been pretty reasonable so long as I've been a customer.

I hope this helps!

TIL that two weeks is a short time for a sale and that it's too hard to use the wishlist and isthereanydeal.

Once again, you speak like someone who has little experience with buying from digital PC game stores in general, and I'm genuinely curious where you're normally buying from and what kind of things you normally buy. I feel like it'd make things a lot more understandable for us if you told us.
Since Steam is the absolute biggest, most popular, and longest-standing market for PC games (to the point that most people don't even know anything else even exists), let's use them for comparison:
1. First of all, GOG's winter sale lasted the exact same amount of time as Steam's, two weeks. 1-2 weeks is the "standard" time for such sales to last.
2. Once again, GOG can NOT just "lower their prices". As you've been told multiple times already, the PUBLISHERS determine what price is set, NOT GOG. Perhaps you didn't understand, but this was essentially the message I was trying to point out to you when I linked you those two games. Everything you're complaining that GOG has to "lower their prices on" is exactly the same price on Steam or wherever else it's being offered. See for yourself. $10 on GOG, $10 on Steam, $10 on Humble. This should make it quite clear to you that this isn't GOG's "fault" somehow.
https://www.gog.com/game/star_wars_tie_fighter_special_edition
http://store.steampowered.com/app/355250/STAR_WARS_TIE_Fighter_Special_Edition/
https://www.humblebundle.com/store/star-wars-tie-fighter-special-edition
3. Not only are their sales at normal length, but the amount of sales they have are also normal. Steam usually has about as many sales.

Pretty much all of your complaints don't really have anything to do with GOG at all, they're really regarding online PC game stores.

This. Isthereanydeal is a massive help. Mark down the exact price that you want (50%,60%,70% off..etc), for the exact game, for the exact store and they will email you instantly each time the exact sale happens. I get that it's irritating to re-check stuff all the time, but with Isthereanydeal it's literally set and forget.

GOG does try to negotiate prices with their games, I believe. No store wants to be the one with massively uncompetitive pricing, unless they are offering something extra special that others aren't. In other words, there typically shouldn't be such things like the game being 50% more expensive on here in comparison to other online stores (USD price).

However, in general, the publisher/developer also has to agree with any negotiations set by GOG. GOG can't just change the price to whatever they like. I think putting games on your wislist does help. I have a feeling that it's also used to see what games they decide to give away for free (or after you make a certain amount of purchases and you unlock it for free), during the major sales.

Not quite true of all products. For instance:
I paid upwards of £35 at launch for GTA4, I have had the misery of playing it for a few hours years after buying it when I got a cracked copy, as the released one failed to work even with R* support. Thus, factoring in the waste of hours of my time getting the bstard to work initially, the cost of it, etc. it cost a fair bit more, and caused more hassle than it was worth.
Juxtapose this with Mount & Blade, which I also brought just after release and have since brought Warband and all the others, and the hundreds of hours spent on that and on the back of modders hard work, I would say I am well in debt regarding that game.

Two clear ends of the spectrum in terms of cost versus return. And they were the two that jumped first to mind, there are literally thousands of examples of each and at each point within the range. Man of war corsair, couple of hours playing (sorry correct that, watching all the bugs, the dreadful animation, the poor levels, lack of anything to do etc.) it for full release.

Cheapest form of entertainment would be sleeping! Followed maybe by gardening (as you don't really need all the faff), or walking (climbing/running etc.). In fact, when you total up hardware + software then gaming starts to become quite expensive versus watching tv or film, or reading, or most things.

What I am saying is to evaluate cost versus merit, where most publishers just chuck an arbitrary amount on based on current largest price they can get away with. Disney for instance, all other old games are going for £5, lets pop ours out at £6, because we can artificially inflate the market to our own ends.

Sure some games provide you with zero hours of fun, and therefore aren't actually worth anything. But I could say the same thing about movies, books, TV or anything else. I'd still say that, on average, video games provide more hours of entertainment per dollar spent than anything else.

I specifically mentioned free entertainment as an exception to the whole gaming is cheaper thing.

As for the price of hardware, that entirely depends how much time you spend playing games. Obviously, if you spend only an hour or 2 every week playing and yet insist on buying the latest hardware, that will be pretty expensive. But personally, I spend maybe 15 to 20 hours a week on average playing games, I only buy mid-range hardware, and I only update maybe every 5 year, so all in all it comes pretty cheap relatively speaking.

If you wish list the game you want, gog will kindly email you when the price drops.

Gog sells games for cheaper in bundles also. I got all of the dnd games for maybe $15 or so. If you plan on playing the games you buy, I can't imagine you getting more entertainment bang for your buck.

If you can't wait for a sale, then you pay for convenience. That's the world.

So... what is the problem?

To me there doesn't appear to be any problem, you don't buy games that you think are too pricey. That's a good approach, I follow that rule too, I only buy games where I find the price agreeable. Works every time.

The regular prices need to be high enough, so when it is on a 80-90% sale they can still make a profit.

I seem to recall an old TV show "If the price is right" or something, which really applies here too... It's when a product is on sale is when they get more money in, usually, unless it's a product nobody wants.

However, saying that you should pay any amount to support the devs really isn't the case with old games, as only greedy publishers are left. That saddens me somewhat but that's the reality, so other than the 10% sale on the JazzJackRabbit game I don't see it as a problem.

At one point I actually paid about 75$ for Hexen in an obscure time in SpaceWorld and in this particularly case I REALLY wanted it :-D

Just FYI, TiE Fighter is worth a lot more than $10.

You can't put a price on perfection.

Add them to your GOG/Steam wishlist and you'll get emailed when they're on sale