Here at Bbs this is one of the best part of Meta BBS is to whether there's no limit of  number that you can post.

So my point is  there's no such limit that  you can post after like clockwork , But make sure that  you are making your own content and the content should be quality substance.

Remember that and you can make 10 posts easily each day and I think this amount is enough for 1 day and you can make 20+ cashables without any doubt.