> But because you don't send the speakers directly to Sonos (instead to a local recycler), they have to trust you're actually recycling it instead of keeping it or selling it.

And to be clear, either keeping it or reselling it would be better for the environment than recycling the device. It's completely backwards to design an environmental program around making sure that people don't secretly do the right thing behind your back.

The fact that there are multiple highly-rated comments on HN looking at resellers and saying, "well, obviously they shouldn't get Sonos credits" shows how poor of a job our society is doing educating people about how reduce-reuse-recycle actually works. You don't have to check for people abusing the system. The people abusing the system are the environmental success stories. If a bunch of people participate in the trade-up program and then secretly resell their devices, that is a good thing that should be celebrated.

If anything, Sonos should be offering more credit to those people, not less.