Yeah, I guess it all depends on whether or not the participants knew what they were signing up for. If Facebook said install this we will pay you to monitor yo

Yeah, I guess it all depends on whether or not the participants knew what they were signing up for. If Facebook said install this we will pay you to monitor your location, internet traffic, and app usage then there really shouldn't be an controversy (other than the Apple terms violation). Do we know for a fact that this info actually was buried in their T&C though?