I still don't understand what compelled IA to blatantly violate copyright law like that. From what I can tell, even buying a book and then digitally lending it

I still don't understand what compelled IA to blatantly violate copyright law like that. From what I can tell, even buying a book and then digitally lending it out, isn't exactly a human right. Regardless, IA was doing that without issue for years. IA then decided they were going to "lend out"as many books as they wanted. To What exactly is surprising here ?