thanks hilariousandco for giving these valuable details to me ! and how you i am become member on tuesday
Your activity rises by 14 every 2 weeks , as long as you have more than that number of posts and you had posted in the 2 week period.
Getting 60 activity makes you member , you need to post 10 more posts to become a Member.
The timing of the 2 week periods and the method to finding them is found here :-
https://bitcointalk.org/index.php?topic=582736