[drugsAreBad0001]

Maybe it's because people in the US would get charged foreign-transaction fees? (probably twice, once from their originating bank, and another by stripe)

Not to mention I don't see how any of the claims you make can be substantiated. How exactly do you determine a modem from a fridge if both use the same 120V source? Even if you could determine device class, how can you narrow it down to actual device-type?

Maybe it's because the "rewards" are obscenely expensive? 17 dollars for a circuit-testing screwdriver? I can get one at lowes for less than $5.

Finally, maybe it doesn't have "viral" potential in the US. We already have power-monitoring devices that you can run on your home network, and the number of people in the US who actually use one is minimal.