I worked for a company that made customers send units in for an ‘upgrade’. The upgrade consisted of popping open the case to pull an SD card out and update a t

I worked for a company that made customers send units in for an ‘upgrade’. The upgrade consisted of popping open the case to pull an SD card out and update a text file with a list of enabled features. Could be a few grand in new features after the ‘upgrade’. I can only imagine a few technicians figured this trick out on their own.