last I checked Anonamouse was very anti-VPN (maybe its just a private tracker thing, not sure - I don't really use those). Which sucks bc I've heard really good things but I'm absolutely unwilling to compromise on the IP address, even just for registration. I've seen too many instances of places getting burned at some point years later and having all this info on users and while I hope that never happens to them, not willing to risk it myself.
For anyone else similarly inclined to never expose their real IP address for even a picosecond, there are some other options too like audiobookbay (daht) lu for audiobooks / irc highway for epubs/mobi (e.g. using hexchat which is FOSS). There's also sanet (daht) st/blogs/audiobb/ (formerly audiobb (daht) com) which doesn't have as much selection but might be good for people looking for litrpgs and other niche things that they can ddl via RG links.