I just noticed today that games which were previously only on GOG, namely Impressions Games' City Building titles, including Caesar IV which was notable for having its digital premiere on GOG some months back, are now on Steam, it appears for about a month. Not sure if I wanna know if any other games or series did the same.

I am officially scared for the future of GOG. Developers treat it as shit, publishers don't give a monkey's, and over 90% of people associate PC gaming with Steam like sheep.

GOG staff, is everything alright up there in Warsaw?

That's been happening for years.
Once publishers know they can make money from their old titles, it makes sense to put them on Steam as well.

I wouldn't sound the death knell quite yet. Digital GOG premieres have been releasing on Steam for a while now. Like Star Wars.

With holding every other store and going the exclusive route is also a very selfish, almost sheepish thing to do if you ask me. GOG is a fine little place but they shouldn't be holding out on every one else with games and you shouldn't be encouraging it.

The more people that play these oldies the better, if that means putting them on Steam and Origin, so be it. If you don't like it, you could always grow up.

You gotta have something to attract newcomers here, right? Steam is too large, and having one big corporation siphon all the money and dictate standards in the industry is a bit monopolistic, don't you think?

As hypocritical as it may sound, I'd sign for certain games being on anywhere except Steam (GOG, GamersGate, even Origin).

Isn't that what the whole DRM-free thing is supposed to do? And pretty much the only (or at least main) reason to shop here? I...don't think that the market would possibly let that happen.

Every game should be allowed to be sold on any place. The more people be allowed to buy and play certain games, the better.

One can't complain that games X or Y (like Call of Duty, Skyrim, Assassin's Creed, etc) are only sold on certain stores like Steam and yet defend that GOG keep certain exclusives.

As for the future of GOG, it's been repeated ad nauseam: vote with your wallets. If people keep buying their games on Steam-Megastore, there's no need for the publishers to sign deals with GOG.
I only buy my games here. If the publisher doesn't want my money, it's their loss.

I agree with the necessity for GOG to stay competitive, it's good if they could acquire the sole rights for classics at least for a little while then perhaps sell them off to reach a higher market once most players already have them here. Hypocritical sure but if it keeps them alive? I rather have hypocracy and great classics then even more indies or losing DRM-free just to stay ahead. Not that I think they will go under anytime soon but that might change.

Considering that people outside the store (and sometimes inside!) still call the place "Good Old Games", I wouldn't say the only reason.

Well, I mean, nowadays. A few years ago, sure, the collection of old games were a draw. I imagine people still call it that because that's what it was called for years.
But...can't these same games now be found Steam and elsewhere? What keeps GOG's collection unique besides the lack of DRM?

To be fair, if they're still 'outside the store' they probably shouldn't be included in what draws people to GOG :)

People are still expecting from GOG to release those old games. Especially those which can't be found elsewhere.
Not all of them. Most certainly, not GOG's cream of the crop; the vast majority of D&D games. The following games are still not available for sale on Steam:
https://www.gog.com/mix/games_not_available_on_steam
They do, if they are gaming news sites. :)

Exactly! As customers we should be thankful that we're given choices and that GOG made reviving old games attractive for other stores as well. I very much prefer GOG's DRM-free approach, but it would feel kind of hypocritical to me to demand that GOG does the same kind of forcing customers into their system that we dislike about Steam, Origin and Uplay, DRM or not.

And GOG would do well to attract enthusiastic customers, not grudging customers like Uplay and Origin. ;P

Better quality control although that seems to be something that is going to get worse and a large part of its collection are older games. 371 games out of 1434 released before 2000 according to MaGOG (excluding multi-edition, demos, non-released).

As time goes on, DRM-free will be the only thing most likely. I wonder if they will try some kind of project GOG will acquire games where the publisher has signed a deal that they will release it DRM-free in a given time. That way GOG could acquire AAA games on release but with a legal precedent that demand the publisher to let GOG strip the game from its DRM within let's say 1 year of official release. An annoying compromise but far better way to survive than relinquish it altogether or keep acquiring useless shovelware that don't sell but clutter up the collection.