Today is not beautiful enough for me. I was surprised by a few things on the forums that I thought I understood. I found something strange again. I think so
My question is:
1] How could this happen?
2] Does he delete all posts and activity will go back to the beginning?
3] If I'm not mistaken, he should at least be a hero member
4] Is this normal? or am I the one who doesn't know about phenomena like this?
This happened to you because you have deleted most of your posts. Anyone who has an activity of 500, and his posts are 600, now if this user removes 150 posts from his overall posts than his activity will automatically drop to 450 because he has deleted those 50 posts that had gained him activity points in past. The activity system works on two week basis, and is limited to 14 activity points per two weeks, a user who makes 14 posts in those two weeks will gain 14 activity points only, and that's how this forum's activity system works. If the same user deletes those 14 posts after gaining the activity points then those points will be removed as well with removed posts.
The user who has 5000 posts and having an activity of 2000 can delete 3000 excess posts, but still there won't be any impact on his activity points, however if he deletes 200 more posts then his activity will be 1800 instead of 2000. Your activity reduced because you have deleted most of your posts, and the posts that remained on your profile were the only ones with activity points. You will have to gain those activity points like a normal user once again, and it will take you a long time. If I'm not wrong then a user can gain 365 activity points per year, and you'll need more than 2 years to gain your activity points back.