It does not a matter, in my opinion.
Bitvest campaign has run in the forum, for years, not recently.
I know there are some users in the forum, whom usually makes 100 - 120 posts per week, with high or extremely high quality, for their own interests, writing for fun (they likely have fun when they write their constructive posts, or simply for their bussiness).
For the rest, 60-post-quota per week is acceptable. I don't see issues with 9-10 posts per day, in average.
For campaign participants, if they spend enough time, and really concentrate on discussion, on what they write with decent efforts for each post, I do believe that they can make it, without issues.