I believe the cause for my lack of online time is due to ublock, because I use it 100% of the time. When I disabled it in the forum, my online time started growing. I am almost 10 days online time now... way less than most users who joined with me or later
I also used adblocker all the time with Altcoinstalks forum and my activity was increasing constantly, but I didn't have many custom filters for this forum.
Maybe some element of the filters is disrupting the process that records member activity growth.
Simple solution would be to use different browser without any adblocker, and just keep forum page open all the time.