I've been engaging on rugatu a little bit, lately. I think it is an excellent concept, but I suspect that there is a small group of users who are colluding.

Take a look at who is accepting answers. It seems like the user cscoxx and some other users are colluding to grab the rewards. Check out his profile and dig through his history. Note the low quality of the accepted answers that he is involved in. I'm not sure how and where exactly he is profiting (he DOES ask (very random) questions himself, but then goes on to accept extremely low quality answers) but something is up. I hope he's just manipulating the system to gain karma, but right now I'm not sending any BTC to rugatu.

edit: Ugh, note to self: search bitcointalk before engaging in anything related to bitcoin. This issue is not new and has been happening for a long time. I'm removing all my answers and won't come back. Might as well annoy them a little