A few days ago JetBrains put in their answer to other coding AI assistants into their IDES, but decided on top of the nags for their new paid service have made it so it can't be completely removed.
If you try to do the normal thing and uninstall or disable it, it appears to just reinstall itself or continues with nags.
I'll say nothing on work environments where code cannot be sent anywhere for security and privacy purposes, but this is just openly hostile user behavior from a company that used to do relatively well.
Shame on you JetBrains