Well you know it deppends on the objectives of this section. I think that this 10 posts thing it too much , this is why :
Let`s say we have a Person X who wants to put and advertisment thread in our Ads branch , so he has to have 10 posts at his count, he willl go on posting them, but they will all be useful. They will all be like :
That is a good idea.
I like it
Can`t wait to do this.
Have a good luck on this one.
And so on ...
There is no scence in posts they will be posting to put out their advertisment thread. But we have to make sure that no service will be advertised twice, no website will be advertised twice and so on, this is a thing we have to make sure, to avoid the spam.