Geez, what a negative take on a company who do their best to be environment-friendly.
I got quite some corrosion on the headphone jack of my Raspberry Pi 2B. Not sure why. But either way, these adapters can be bought anywhere, and they'll work on other devices as well. Like I said, I didn't use mine much. Usually Bluetooth with an adequate profile is good enough. I doubt people hear the difference between Bluetooth adequate profile and 3.5 mm in a double blind test.
I got quite some corrosion on the headphone jack of my Raspberry Pi 2B. Not sure why. But either way, these adapters can be bought anywhere, and they'll work on other devices as well. Like I said, I didn't use mine much. Usually Bluetooth with an adequate profile is good enough. I doubt people hear the difference between Bluetooth adequate profile and 3.5 mm in a double blind test.