After Amazon purchased "Good Reads" (and promised not to upset the trusted book rating site), promptly instituted all new rules.
The once free book giveaway program (where readers bid to receive a free book in exchange (theoretically) for book reviews on the site, will now cost serious bucks. $120 for the 'Basic giveaway package) and $599 for the 'Premium' giveaway package!
Amazon is now demonstrating what it thinks of the sites it takes over, promising independence. It strips off the parts it likes for their own Kindle Prime service, and then remove the features that readers/fans admire in the sites (like the CS book store, where authors earned more than they do under Amazon's Kindle service).