On the Facebook integration, one thing is clear: There will be some information sharing, although WhatsApp promises no messages or photos will be shared with Facebook. This is what WhatsApp says on the info-sharing with Facebook:
This information includes the device used, online status, usage and log information. WhatsApp carefully points out in the FAQ it won’t share any information ‘onto’ Facebook or other Facebook apps, but yes data-sharing will happen. The reasoning: To help improve ad experiences, to more accurately count unique users and fight spam and abuse. Exactly how Facebook ads will improve with WhatsApp information is left unclear, but there is more.
WhatsApp is also getting ready to welcome services such as banks, airlines on the app, an idea that has been discussed earlier as well. WhatsApp’s latest blog says this: These services are coming soon, and they will start testing it on the app. For WhatsApp, which has never actually made any money, and is still not serving ads, this is one way of generating revenue.