I’ve switched to the RBG and INFINITY x265 1080p releases from TorrentFunk or 1337x. IMO they are a decent replacement for the RARBG x265 1080p releases but its hard to find some movies.
The selection on RARBG was just insane…
That being said. You can still find plenty of the old releases on other trackers.
If you‘re comfortable with S3 then https://wasabi.com/ is a nice option.
You can do backups to S3 with https://github.com/restic/restic or mount it to your system using S3 fuse.
I don’t really think they will care about the data you put on there (you can encrypt it with restic) unless you‘re directly distributing pirated content via S3.