[bartp5]

The MAC's all start with the vendor part (20:59:A0 of Paragon Technologies Inc.). The rest I presume is randomly generated when the firmware is flashed (I could not verify this). I believe these sort of practices are not all that uncommon, it is very practical and simple. It may not strictly ensure uniqueness but with the address space of Paragon Technologies consisting of about 17 million addresses it practically does. Obviously, it poses a problem when updating firmware while relying on the MAC address being always the same. However, in most cases a constant MAC address is required because MAC filtering often gives people a false sense of security. It is trivial to change your hardware address in software and trivial to sniff out a MAC address that is granted access. For security I do not think it really makes a difference if you make it a firmware address instead.