WhatCD was pretty damn good, I'd say it rivalled Oink. Remember the bounty on that MSFT forensic tool? The copy of the unreleased JD Salinger novel? Both fulfilled...
What was the story there? Iirc it was in the Princeton rare books library and it was hard to get access to? Guessing someone took photos?
https://en.wikipedia.org/wiki/What.CD#Leaks
https://www.thedailybeast.com/what-the-leaked-jd-salinger-st...
https://www.theguardian.com/books/2013/nov/28/salinger-unpub...
Directly calls out WhatCD