That is not how it works, his activity will rise by 14 if he posts in the next 2 weeks.
https://bitcointalksearch.org/topic/forum-rankspositionsbadges-what-do-those-shiny-coins-under-my-name-mean-178608
So in the next 2 weeks you should be a member and can then join good campaigns. Just look around at which ones most people join, they don't flock to the worst ones.
You are the one who don't understand how activity works. lol. Please understand the formula correctly.
The formula is:
The activity number is determined in this way:
time = number of two-week periods in which you've posted since your registration
activity = min(time * 14, post)
Since he posted 9 two week periods. He should have no problem getting a full member once he have 120 posts.