<< What kind of money does Roku make from getting peacock on their device.? >>
Roku makes money from ads. If NBC places ads on Roku devices, then Roku will make money.
Roku makes a small percentage from subscriptions. For every customer that subscribes to Peacock, Roku will get a small cut.
Roku makes money from devices. If someone decides that they want to subscribe to Peacock and buys a new Roku device (streaming box, TV, etc), then Roku will make money.