Does any pool works?
No pools work as one person has been mining the entire supply for well over a year.
The selfish miner is probably the original dev Nathan Rixham, who scammed people and stole their money, and never paid back his debts. Looks like vindictive sabotage going on to me, he's still around, and wants BTM to fail.
Looks like polo have no reason to keep this coin listed anymore, I think they only put up with the selfish mining as they used the marking system in the troll box.