If I didn't want to put something down I just wouldn't have participated at all. Honestly the fact that it's a relatively short two week commitment (with the amount of expected content proportional to those two weeks) is pretty freeing. I get to work on a short little game and if it ends up being something I don't want to continue working on, then it's done! I get to move on to other stuff without having another unfinished project. Also trust me, every project I've worked on has been "rife with bugs" that I never would have found before public release. That's just how it goes when you don't have a dedicated QA team. Mostly I think it's silly to blame the jam for the game's shortcomings when the game wouldn't have existed at all without it. Much easier to get a team to agree to work for a two week period as well!