I've seen the showcase of buildbox (pricy as hell!!!), and GameMaker's showcase, and there are a LOT of very famous games in there...
Yet, I only know 3 semi-well known games, and only because I'm a member of the C2 (The next penelope, Cosmochoria and Airscape).
I refuse to believe the community here is less competent than GameMaker's and BuildBox's community, which leaves me really buffled...
On a sidenote, I absolute LOVE C2, although I'm creating very simple games for now..