Thing is, did anyone really expect anything else to happen? Facebook paid over $20 billion for an app with a huge user base and no revenue stream.
“WhatsApp obtained one billion users by promising that it would protect user privacy. Both Facebook and WhatsApp made very public promises that the companies would maintain a separation. Those were the key selling points of the deal.â€
http://motherboard.vice.com/read/whatsapp-facebook-privacy-complaint