pool.mn was literally only pool I hadn't tried... Few days back I had read they were skimming coins from people So sadly that'd explain your payout dropping

What I wouldn't give to get a Signatum Nanopool lol, I got like 2 coins all day from this madness of pool hopping due to pool shenanigans.

But yeah, all these pools got the same exact site design, either some open source shit or run by same people. Because it's like they don't even bother trying to customize the sites.