A magnet link can be used to download the torrent file.
They're only more private in the sense that the link itself is not a torrent file you download and open. Instead, it's a link to that torrent file, downloadable through bittorrent.
It doesn't make your downloading any more private.
How do they make their service "not available" to a country?
By IP address location? Which, in my understanding, is not accurate.
By terms, stating "you can't use it if you live there"?
If you buy the book but listen to it as an audiobook, wouldn't buying the audiobook in the first place be an option then?
cuiiliste.de is an effort (of one person) to make the list and its effects transparent, and inform about how you can switch DNS.