So if I understand it right, it has more to do with recent time on the site than it does with posting.
I believe the site looks back at the past 90 days and sees how much time you’ve been on the site. I don’t know what the magic number of hours is but you have 8 hours recently and @WaterProEC has 6 hours. So it’s more than 8 hours apparently. My guess is that it’s somewhere around 12-16 hours. But that’s just a guess.
Never say there is nothing beautiful in the world any more. There is always something to make you wonder in the shape of a tree, the trembling of a leaf. — Albert Schweitzer