Re: How do you increase the "activity" in BBS? How long have you been in bitcointalk
How many "activities" will update my account
What are the benefits of an account upgrade？
What are the benefits of an account upgrade？
The link below explains account levels and what benefits you gain as you upgrade:
https://bitcointalk.org/index.php?topic=1689727.0
The following link explains how your activity number increases:
https://bitcointalk.org/index.php?topic=582736.0
Basically you get one activity for every post you make up to a maximum of 14 for a two week period. You will become a Junior Member once your activity reaches 30.