Discussion
Looks like another pool may have turned on full-rbf: https://mempool.space/tx/80f9630855e26aed27f1e6ab124da8303f8e2a904d665c4999c9db385ad14ff1
So that's Luxor, AntPool, Binance, EMCDPool, and possibly now ULTIMUSPOOL.
I'm learning new pool names every day!