If you actually understand that GOG Connect is a business move, then asking them to do things that facilitate people to prefer a different, competitive store over them makes no sense. And using terms like "they need to get some balls" and "grow a spine' really have no place, regardless of the argument you're making.

There are plenty of online stores that offer what you're looking for - access to Steam games at better prices than on Steam itself, GOG joining their ranks is more likely to shrink their market share and render them irrelevant down the road. I'm pretty sure that's not GOG's goal with GOG Connect or any other business decision they've made so far, and have planned to make in the future.

Fair enough. But that's really more of a reason for GOG to get those Linux versions here, rather than to have users get them from Steam through Connect.

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The point isn't to directly increase sales revenue, it's to get more people to use GOG. They're playing the long game.
If you didn't use GOG before, you might use it now since, hey, free DRM-free games and with extras and goodies and stuff.
And if you stick around for long enough, you might realize, hey, GOG isn't so bad.
And then you might start buying from GOG.
Etc.

Not really, no. Considering that most Steam games are cheaper than the prices they're offered at in GOG sales thanks to bundling services such as Humble and Groupees, if it was a two-way system, most people would still opt for just buying the Steam version and getting the GOG game rather than the other way around.

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...what?
I don't think so. I think their aim is to get more people to use it as an auxiliary service than they had before. Even if they're only using it as an auxiliary service, it still means that they're using it, which means more money for GOG in the long run.

We'll have to disagree. I see it as GOG having a mid/long term business strategy to increase their market share, and not as a means to increase direct revenue in the short term. zeogold has covered much of it in his reply to you.

Additionally, your suggestion that a Steam version will "likely" be eligible for free activation here is just speculation at the moment; GOG Connect just went live. And for games in a series in particular, like Two Worlds and Bit.Trip Runner, I think it less likely that the other games will make it into GOG Connect. If someone joins GOG to get these two for free, and find merit in the store and the service, they may buy the others here too, and eventually buy other games too.

We have different views on the matter, but that doesn't mean that I'm 'absolutely wrong", my take is simply different from yours, but yours isn't a fact either, it's just your POV.

You've got to remember that Connect is both time limited and game specific. Buying a game on Steam in no way guarantees that at some point you will get it on GOG via connect.
I wasn't really looking to get into a discussion as to why Linux versions aren't available, or what GOG needs to do to make it happen. The question was "why would anyone want a steam version of a game they already own on GOG". I gave my specific answer. A more generic answer would be: sometimes there are things in the steam version that aren't available in the GOG version, just as there are sometimes things in the GOG version that aren't available in the steam version.

For the record, I don't actually agree with the OP. I see no reason why GOG should want to hand out steam keys, or what benefit they would derive from it. Worse, it potentially drives away a good chunk of GOG's current customer base who shop at GOG precisely because they are not just another steam reseller.

I'm not sure about other games but I think Saints Row are just wine wrapped.. Nothing you can't do yourself. I played only a bit SR3 in wine but seems to work fine.

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Nope. There both Virtual Programming, so they use EOn - same as Witcher 2.

Good to know, thanks!

So much this!!! Often, when I read posts about stuff like this Connect thing or FREE games, I ask myself - do the OPs understand that everything here is a business move.

The issue is that then there would be no competition left for Steam... well except Microsoft's "Tiles" Store :
https://medium.com/@KingFrostFive/steam-monopoly-monopsony-40b6461b4252