By the way BETCOIN.AG minimum posts limit isn't 30 actually but it is variable depending on the average posts each user had made during previous months. So it could be 70...etc
Honestly, they should just declare how many post count is required for their members instead of making their members debate on such thing. I'm just going to put "**" in their minimum post since no one really knows how many post count is required.
It's hard to assume what's the average post of each member there. When I was on that campaign they doesn't have an estimate of average post monthly and I think it's better if they will continue to do pay per post instead of having a fixed price. It's their campaign though but there's a lot of misunderstanding with the remaining participants there and before the maximum is 100. Putting "**" to the minimum post is a good idea.