Its true! Not all of us here in forum can make 25 "quality" post a week since most of people are here for just several hours unlike those managers and DT members. That is why I suggest that in a signature campaign, if you are a member or below, the recommended post is 15 post a week to ensure the quality of the post.
Some of the signature campaigns here allow up to 60 posts a week and some members are able to manage that. I know that one cannot not make so many high quality posts unless he is doing this full time. But I mean those signature campaigns must be benefiting from those posts as they are paying for them for quite long turn. Why will they keep paying the participants without any returns. Regarding this thing affecting the forum , all those submissions are checked by the campaigns manager and he counts only valid responses.