RighteousFog

It should be open now. Or at least, it was yesterday.

Prowlarr properly shows if a torrent is freeleech for me. Maybe the feature was added after you tried it?

And Prowlarr is even better if you're also using Radarr/Sonarr/Lidar.

It's really unlikely that an EPUB would be able to damage your devices.
This is more likely to be a hardware issue.

Not a website but a tool: https://openaudible.org/ works really well for Audible audiobooks, and it's the only tool I found that works for Japanese Audible.