bugmenot usually has a few working audiobookbay logins if you don’t want to deal with setting up an account

You can grab the hash and bang it into a magnet link converter like this one: http://www.romanr.info/magnet.html

Yup

If you use something like Jackett or Prowlarr, no. If you use the web interface, yes, but they don’t verify the email you enter, so you can just type in a random one.