I think I will give GOG my monies. It occurs to me that even though there's considerably more likelihood that I'll wake up one day and GOG will be going down in flames than there is of Steam ever going away, at least my GOG installers will still work perfectly, whereas there's no guarantee with Steam because no matter what Steam itself is still DRM and nobody knows what will happen if for some crazy reason it bombs.
I'm pretty sure the Witcher 2 installer file(s) will be much, much larger than my installer for Duke 3D though. :lol
I used to prefer getting games on Steam if they were on both services just for the sake of having them on Steam, but GOG being completely free from the "DRM monster" is just too good a selling point for me these days.
Pirates will be pirates regardless. Fuck 'em.
EDIT: motherfucker, this is not the GOG thread. Oh well, it applies just the same. Sorry! :lol