Software can detect the hardware it's being run on. I imagine that massive amounts of targeted clicks and views detected from x86, or emulated Android, would trigger fraud alerts.
Additionally, phones are cheap and use a lot less power then the x86 cluster required to replicate that many "individual" users/devices.
On top of that, they pay these people so little that it's cheaper to hire 50 of them for a year than to hire one person to run an operation like that for the same time.
Software can detect the hardware it's being run on. I imagine that massive amounts of targeted clicks and views detected from x86, or emulated Android, would trigger fraud alerts.
Additionally, phones are cheap and use a lot less power then the x86 cluster required to replicate that many "individual" users/devices.
On top of that, they pay these people so little that it's cheaper to hire 50 of them for a year than to hire one person to run an operation like that for the same time.