How come I still have 98 Activity with an Account which is over 1 year old and over 300 posts?
The main reason i see is you dont make a post every update of activity it happens every 2 weeks , so even your account is 3 years but your not posting it will not affect to your activity . you need to be first get more active here in this forum and do not forget to actively post here to get those activity points every update.