>>simonh+E1
It snitches regarding what kind of device and operating system you're using. It currently seems to be limited to Apple devices, but this is the sort of thing I could see Microsoft and Google going for. Put another way, if everyone running unmodified corporate operating systems
proves it as a matter of course, it effectively snitches on anyone who isn't.
Running Linux? Rooted Android? Anything else weird? If this gets popular, you might not be able to access most of the web with it, at least not without constantly filling in CAPTCHAs.