This looks bad. If certain bitcoin transactions start to be censored on the basis of suspicions, we are in trouble.
I find myself uncertain about how to interpret all of this information. Despite the seemingly small number of just six transactions, the fact that such situations are possible raises concerns. I'm grappling with whether this should be a cause for worry in the future or if it's perhaps an overblown issue. The writer of the report leaves us with this:
The Bitcoin network, however, continues to work as normal. A single pool filtering transactions does not affect the censorship resistance of the Bitcoin network as a whole. <...>
This is the best part of the news. As long as there are no pools that mimic this, as long as there is a large majority that resists, bitcoin transactions will remain uncensorable, because transactions that a censor miner decides not to mine will end up being mined by others.