On Area51 each user can post up to five questions on any proposal. Any given proposal could have 5x its follower count in questions (not counting questions from non-followers), creating a glut of questions. Further, because you can earn rep from your questions we're encouraging people to ask as many questions as possible.
The end result is that some proposals are hard to follow because they have too many questions. Worse yet, some proposals fail to gain traction because the large number of questions cause the votes to spread out too much.
I think we can fix this by charging rep to suggest questions (perhaps giving the first one away for free). This way, you have to be fairly certain your question is good enough to earn votes before you post it (so you'll make your rep investment back).
What do you guys think?