Now, there are people who have working 4G by way of a cloned MAC address. Some of these people do have legitimate WiMax service on another device (tablet, laptop, bundled with their home ISP, etc.) Others are basically piggy backing on service someone else pays for, and that is just plain old illegal (like stealing cable). The opportunity the Evo Design opens up is that it may be possible to use it as a donor and, for example, use Boost with 4G on an Epic Touch instead. $299 is a lot to spend on a donor phone, though.
Really though, the whole thing is absurd and Boost should just implement actual BYOD.