Amazon are using their devices to get a lead on the competition, and in a way which consumers are unlikely to think is fair.
If a company approaches me wanting to put infrastructure in my house (that only benefits them and may incur charges to me), they should normally expect to pay rent.
Everyone pays for their own household now, only because of general corporate scaremongering and specific lobbying to claim that the owner is liable for misuse.
I remain surprised there isn't a bigger movement and open source infrastructure for sharing connections locally.
If I was able to share a few connections with my apartment-neighbours, that would be cheaper and more reliable than my current setup.
Personally, I'd be happy to share my connection with another human being
This isn't really the same thing though, it's Amazon treating all its customers like a harvestable resource, and reselling that resource as a value-add for their other products