This is the biggest one for me. Anyone who has that data is capable of playing back the 0-days that affect android. How many android phones are kept out of date?
As other user mentioned, the Android ecosystem is like the Wild West. Given there's a report for 2.5B active devices, how many can be affected by such an attack?
1% would affect 25M devices, around the population of Australia.
10% - 250 million devices.
40% - 1 billion devices...
Perhaps their motivation is to launch a campaign saying "Facebook keeps you safe!" by scanning your phone, and use it to justify people signing up for more surveillance. Perhaps this is a stealth beta test.