Well that could be misleading. Have you just tried to work out the activity by looking at their sign up date? They could have missed many periods in between otherwise.
It isn't difficult to calculate how much activity each account can reach, it really only takes a few minutes once you have the dates the activity periods ended.
There are a lot of older accounts that posted less then every two weeks and missed several activity periods.
Thanks. I said I can't promise because my calculation might be wrong. Suppose, if it was and I promise, it is scammy even though it was unintentionally.
It wasn't calculated by looking registration date, calculated by looking activity timings. I will try to check. Hope everything is correct.