Well, I also joined the forum under rsviper. I haven't tried yet posting so I don't know whether it is 2 cents or 3 cents per post though it claims 3 cents. I will be there only if it is 3 cents, otherwise I will leave the forum.

About post limit, it is actually I think maximum you can make 25 replies and 5 threads per day. There is no rule you can have only this much post in each section, so you can even make all 25 posts in one section.