VLC is usually pretty good with ignoring all dvd region coding, same for makemkv. You could try using one of those to get around the region lock of your drive, if you have not done that yet.

At least in the EU there are plenty of alternatives. Big book retailers often have an ebook download shop as well as publishers running their own ebook stores. Google Play books, iBooks and others are also around, although much smaller than Amazon. Ironically it's mostly the indie authors that are only on Amazon because they made it "easy".

This was always going to happen. Even if this costs them more subs than they gain in the end, you would not see that at this point. The people are subscribing now while cancelled subs will only run out over the next few months.