The transactions look like a coin mixer.  That would imply someone is covering their tracks and the block reward was stolen from mmpool.

The theft or loss of pool funds is not the miners' responsibility.
Miners pay a 1.5% administration fee in exchange for the administration of the pool and its processes.

There is currently a debt owed to the miners. 
unfortunately, that means that it is unlikely that you will be paid for the hashes you are still contributing to the pool.

If the pool takes this loss, then the pool's financial position is weakened by that loss. 
There was a time when mmpool had a cold wallet and would pay reward shortages out from the cold wallet. 
That hasn't happened this time.  It is growing more and more unlikely.

If the miners share the loss and remove the last block from the pool history, then we have an oversized DGM payout in the next round. 
Again, it is not likely mmpool can pay more than the block reward since mmpool appears to be insolvent now.

If the last block's rewards are paid, then we know mmpool still has reserve funds from the DGM payments.  Confidence will be restored. 

For that reason, I have stopped all mining at mmpool until the last block's rewards are paid.