I commit to participate actively in (PROPOSAL) for at least three months, especially during the private beta, and to ask or answer at least ten questions.
It seems like they don't care about anything but the 10 posts. On math I currently have 9 posts and have been told I fulfilled my commitment shortly after posting my 7th, 8th, and 9th that day. (sorry if I post more stuff soon :)
(I know its really minor, but somebody had to report it).