Did you notice that this trend began just slightly after Good Old Games became gog.com, and started selling Assassins Creed for $20? They gave up the fight, and wasted resources on games on sale on steam for 1/4 what they ca sell for.
Sorry, I don't quite follow you. If you are really suggesting older classics started appearing on Steam because a couple of semi-new games appeared also on GOG, I find that laughable.
The reason why older classics are appearing also on Steam, GamersGate etc. is because they have understood as well that they can make money by selling them, and because they want to widen their catalog also to older classics because EA, Ubisoft etc. seem to become more and more jealous and possessive of their newer AAA titles, like Mass Effect 3. They rather see people buy them from their own digital stores instead, not Steam.
GOG has X resources to pursue new deals. This is objective fact.
GOG diverted Y resources to pursue deals to offer newer games. Also objective fact.
X-Y < X. Yet again, objective fact.
Therefore, GOG now focuses less resources on pursuing deals to acquire old games. One could logically infer thusly that other publishers/vendors may gain an advantage in negotiations, or finalize a deal that GOG would have before diverting Y resources.
Editors comment: I really don't understand the concept of being adversarial just for it's own sake. I get it, many of you dislike being proven wrong, and the manner in which I go about it is blunt, to the point, and unrelenting. But that does not change the fact that you are wrong. Correctness and incorrectness are ultimately all that matters. Petty human emotions, social norms, and feelings are irrelevant.