They're two COMPLETELY DIFFERENT SITES.
The site we're talking about here is WWW.GAMETOP.COM.
GAMETOP has COMPLETELY FREE, FULL-VERSION GAMES. I've played a bunch of them. I was skeptical/concerned at first, and was worried about malware, etc., but I have been playing their games for more than 2 months now and have had no problems whatsoever. You may not like all of their games, but they have a lot of them and they're in all different genres, so you should be able to find plenty that you'll like. I've played on other sites (big fish games) where they offer a 1 hr. Trial, and have REALLY increased their prices to buy old games. Just before I stumbled across gametop, I had bought several old games from bfg that I had wanted to play for a while. When I found gametop, 4/5 of the games I bought from bfg are on gametop, full versions, FOR FREE.
Yeah, I'm still annoyed...

Gamestop.com sells games.