Your comment piqued my interest, and I found this discussion from 2017: https://forums.raspberrypi.com/viewtopic.php?t=173142 https://forums.raspberrypi.com/vie

Your comment piqued my interest, and I found this discussion from 2017: https://forums.raspberrypi.com/viewtopic.php?t=173142 https://forums.raspberrypi.com/viewtopic.php?t=173142 It seems you can sell a Raspberry Pi-based contraption without paying SIG fees as long as you make it impossible for end users to use the Bluetooth functionality / disable/brick Bluetooth on the device.