tfishell: I mean, obviously I could be wrong, but really you could say this about any beloved classics - more people will be excited to see them on Steam because more people use Steam. Look at System Shock 2, I Have No Mouth, etc.
It kind of brings up the question (or at least one I sometimes ponder), could GOG have gotten to where they are today by not having
any exclusive titles?
This is a good question, so good that I'd like it to be answered during the Twitch TV streaming event.
My guess would be that it would have probably taken GOG longer and more effort, and would have required for them to adopt some changes sooner.
Back when GOG started, Steam still had a good number of issues with its service and not all people were that eager to make the jump, at least not as their exclusive place to go for PC gaming; even without the exclusives, GOG would still have gotten a number of agreements first (given how even today, Steam is not actively after reviving classics), thus it would have had a decent chance to attract folks and get them to stay around, more so if GOG stepped up their game sooner than they did in terms of guaranteeing working versions, offering good support, providing a different update system and releasing newer titles.
This of course begs the question if they would have been in a financially sound enough state to do all these things sooner, I guess that if they were determined to stay around and grow, they would have made more sacrifices in terms of revenue and profit.
But since we can't turn back time, we won't ever know for sure.