Is this the second mining pool or the third that add OFAC? It is unfortunate that these pools respond to pressure from the United States, but this will not change the nature of the decentralization of the network. If there remains one mining pool that does not adhere to these legislation and can be managed in countries that have a political stance towards the United States, then all the other mining pools will be forced to build on top of that block, but this means that transactions transmitted from addresses in OFAC blacklist will take longer on average than all transactions from other addresses.