I had my first experience with this recently in which my Netlify account I was using to host a small local community / volunteer project was automatically flagg

I had my first experience with this recently in which my Netlify account I was using to host a small local community / volunteer project was automatically flagged and suspended after I logged in. DNS for the project was also hosted there and when an account is suspended all DNS records are wiped and sites are immediately taken offline, so even things not hosted there (backend and mail server) were also down. I don't use it for any professional work (and likely never will after that) and was on a free plan so maybe on a paid plan it's different. I'm just glad it happened with that project where it didn't matter and not something critical. I would also recommend buying a domain for your email, that's what I did a few years ago and point it to Protonmail. It's not self-hosted but at least I can always point the domain somewhere else.