When I have time I get at least 10 points a day which is about equal to 10-15 posts. Sometimes My schedule gets busy and I don't have time but I do try and get on here at least once every other day in that case. I enjoy posting here too
It depends on how active you are, and whether or not your posts have useful content. Writing spam or offensive posts may actually cost you more than you earn.
I have no idea but I believe you can easily make the miminum amount to withdraw in one month, all depends on how acitve you are. You can also use ForumCoin to promote your business and that will probabily will make you more money than the one you get just for coming here and doing normal posts.