* Wang
Excellent analysis by nostr:npub1kyxqqqq8n2pu7f5pthr48zqcmr2k52vrud6wxzjpg0jsqcyhs3tshfc6vv. It was subsequently confirmed by Wan Chun of F2Pool, but they've decided to stop filtering transactions for now.
https://b10c.me/observations/08-missing-sanctioned-transactions/
Discussion
Back in 2021 MARA announced that they were going to do this, and even put an OP_RETURN statement in their Coinbase transaction to that effect. But afaik they never actually did. After* our podcast on the topic they backed out and even replaced their CEO:
https://podcast.sprovoost.nl/@nado/episodes/mara-pool-and-mining-censorship-nado-37
* = correlation, causation, etc