I must admit, regardless of the dev's transgressions (it was fairly obvious that they were a produce-a-minute shovelware peddler), I had my fun with the GooCubelets games, but then I've always had a soft spot for sokoban games. I've probably got some of the other games, I'll check Steam later on.
Edit:
Looks like Steam has removed the AppIDs completely. Doesn't bode well.
Edit 2: The two Zatwor games are still on my account, as are the four GooCubelets games I had, Beast Blaster, Brilliant Bob, Why So Evil 1 & 2 and probably some others I picked up off Indie Gala. However, the achievement pages cannot be accessed, although I can still apparently unlock achievements.
There is the argument that these games are no great loss - aside from GooCubelets, the games were card-farming shovelware at its worst. But still, it stands to reason that if I enjoyed GooCubelets, there's probably someone out there who liked at least some of the other games. And it's a knock to game preservation, illustrating the dangers of relying on digital distribution (the games were "DRM-free" as far as they can be on Steam, so if you copied out the archive, they will run independently)