Time4Tea: Sure, I have added your name to the sympathetic list. Although, I am curious, where is your line in the sand? What would GOG need to do to convince you to boycott, if releasing a game that includes blatant always-online single-player DRM isn't enough?
Something like this: if they go something like "full force" always online for
majority of single-player content/games, I'd stop shopping here, or if DRM-free installers were entirely removed.
If DRM continued as a "trickle" (which it might), it'd depend if the online requirement was for a single-player content / game that actually
interested me, which there aren't many of right now.
I bought Tomb Raider Legend, Anniv, and Underworld recently, and I'd do it again, and I'll probably buy Serious Sam 2 and 3 if they show up eventually (assuming a nice discount). Doom 3 + RoE original too, the Humongous games (which I already own on Steam so why would I get them if installers weren't available), and a few others.
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Part of me wonders if GOG is effectively throwing in the towel on DRM-free requirement, in part, because of sites
dedicated to illegally downloading GOG games (not torrents, you don't have to worry about seeders; though I'm not a tech-knowledgable person). I don't know particularly how popular they are (though probably more popular than I'd like :p) but I see links to them posted on 4chan /v/ sometimes. As GOG has grown and their name has gotten out there, I wouldn't be surprised at this point if GOG versions are pirated more than Steam versions.