Well - not that well known.
I can find references to less egregious incidents - i.e. they ban running actual crypto software. Do you have any links I could read to find out more about the more extreme end of your claim? i.e. " storing files that have the word "bitcoin" or any other word that Hetzner does not approve of"?
If this is true then it's a reason for anyone to avoid Hetzner as accidentally triggering it would be possible on almost all websites. If you're exaggerating for dramatic effect then that's fine I guess - I'd just like to find out the real state of affairs.
so if you have some kind of service/api/trading bot/scraping/monitoring hitting a somewhat related to crypto node you may find that you will have no routing from hetzner core router to said server
and support is as friendly as other comments describe :)
In my experience, the support is not friendly, but it is no nonsense. Every time I've reached out, they responded quickly, tersely, and took appropriate actions. While I don't personally mind formalities, there's something to be said for their efficacy.