Google don't fully remove you.
https://www.google.com/search?q=lfgss
That will return the website as a first result (I run https://www.lfgss.com/ )... but no description or metadata. Lots of tangential results talking about it... the first result is more like a shadow profile, a more fact an exact domain match exists but nothing more.
Two months ago I had almost 7 million pages indexed from that site.
For this community, it was their objection to their content being used to train AI that caused them to request me (the owner / admin) to exclude bots. I surveyed more widely, presented arguments in a balanced way, then when the result was overwhelming I hard blocked all known bots and useragents and pretty much everything that looks like a bot and user agent.
It's early anecdata, but sign-up rates have not been impacted at all.
Several other communities I've run have taken similar decisions.
Defensively with the UK Online Security Bill some of the other communities I run are considering similar things.
Feels like the end of an era, communities seeking to protect themselves from external threats, and search engines providing as little value as search pre-Google.