Distribution of User Content may be subject to third-party rights. You agree that by using the Plex Solution you will not upload, post, display, or transmit any of the following:
anything which defames, harasses, threatens, offends, or in any way violates or infringes on the rights (including, without limitation, patents, copyrights, or trademark rights) of others;
I'm assuming that benefit of hosting Plex somewhere is that it scales to multiple users better when running/selling Plex as a paid service and this is too visible for their plausible deniability.
I also don't think it's copyright related. PLEX server are small communities, family & friends and not some open tracker.
And I don't think Hetzner started illegally snooping around in their customers stored data and complaining to the PLEX developer about it. PLEX themselves? They could close all servers if they started snooping around what the users have. And no other party can see what media is on there.
I think there is some other reason but no clue what.
Hetzner running some diagnostics and seeing high traffic and storage? Then they would probably just inform their customers themselves and not via PLEX.
I hope we get more information in the next few days.
I afraid Microsoft will ban me for reading news articles copied from websites without permission, or just having a pirated game on my Windows partition.
Or maybe Chrome (I use FireFox, just an example) ban me for visiting "unclean" websites.
Maybe even the landlord of my rental will kick me out for keeping book post due from the local library.