For the record, there have been cases of companies (IIRC Cisco wifi routers) that attempted to do this retroactively - pushing a firmware update that "helpfully

For the record, there have been cases of companies (IIRC Cisco wifi routers) that attempted to do this retroactively - pushing a firmware update that "helpfully" made the hardware cloud managed only. So indeed, buying open API stuff only is a good start, unfortunately one still needs to be vigilant.