Actually, someone here on MR lives in Estonia and said she/he is getting charged a 2$ fee per book she buys from Amazon.com, even though she/he is also paying the astronomical sales tax in addition to it, and she/he never uses 3G to download the book. I can't for the life of me remember which thread it was... maybe somewhere in the general forum. I'll go looking for it. I guess Amazon sometimes adds a substantial surcharge. The same may apply to subscriptions.
Found it! Not sure how to quote a specific post, but here is the thread
, scroll down on page 1 to yapyap's comment.