The long-running Fediverse group service Guppe (https://a.gup.pe) will shut down on 31st May 2023 if it doesn't receive enough funding to cover its costs:
A post is not a press release, so it's not analogous. Do you think I'm writing a press release right here?
If I have a website I do expect that ethically built web crawlers will respect robots.txt. Website building has a bit more of a learning curve than social media posting, so it's not as unreasonable to expect a person to know it out the gate, but I would say that it's not an ideal system on that account. Better opt-in with #yesbot than opt-out with #nobot.