The single biggest use of stolen University logins is to download papers
cs.columbia.edu
cs.columbia.edu
A friend of mine was complaining that he couldn't share his Kindle ebooks with friends which was something he did a lot when he had actual books. Now he can only recommend they spend money on stuff.
Citation needed.
There are some I don't though and for these I'll first speak with friends at other institutions before contacting the author.