1. They are limiting resources - no more unlimited storage, no more free CI runners, adding Anubis to protect server load.
2. They have banned cryptocurrencies and blockchains
3. They are banning AI contributions
I think 1 is perfectly reasonable for every service. Machines cost money, and that money needs to come from somewhere. When one donates to a platform like this, the intention is to support open-source code hosting. Wasting this money on cryptospam and badly-coded AI scrapers is a very bad idea.
For 2, there is a general crypto-apologist logic about how crypto-currency is OK while completely ignoring that most of the crypto-currency projects are just grifts to steal money from people. There are real reputation risks in being associated with that stuff, and I can't really blame anyone for wanting to stay away from it.
Point 3, "block AI contribution", is actually the most important one - as author points, even Linux has AI patches, and it would not be acceptable under the new rules. Making a post just about that part could have generated much more interesting discussions, too bad that points 1 and 2 detract from the message.
(And yes, every service has some opinions, including Github which blocks active malware (when discovered) and copyright violations. It's just they don't touch author's areas of interest, so author does not care)