Sorry, what are you trying to do? Anna’s achive is not selling anything. You can donate to them, and in return they will give you fast downloads from their mirrors. But you are not using their mirrors, you’re using torrents, right?

Like you just literally go to https://annas-archive.gl/dyn/generate_torrents?max_tb=1&format=url

And it will give you a list of torrent files you can download to seed their content as a backup for them, to preserve the knowledge. At no point do you need a membership (not even if you want to download individual files from their servers, you just get slower download speeds which will still have you downloading books in a minute or two).