I think there may have been a bit of a glitch at trtl.mine2gether.com. I re-started mining after the fork, received a payout then nothing for ages (should be about 500 every payment), then suddenly a 2500 drop of TRTL turned up in my wallet.
The TurtleCoin network faced at least three attacks in the last few days and the result on
https://trtl.mine2gether.com/ was that almost all blocks were orphaned. Then after some time after the system came back to normal and big payments were made.