Probably nothing. Calling mass copying and distribution of copyrighted material "fair use" just because you bought a single book is a very tough sell, legally speaking.
It isn't archiving that's the problem, it's the distribution aspect. Calling it "archiving" is disingenuous, or, more accurately, a complete lie.
heelspider t1_jdwz0ee wrote
The hyperbole in this article is too much for me.