That theoretically shouldn’t happen, but you just got a loophole of our system that we still didn’t found a solution for. So, I would say…enjoy them 
I’m not 100% sure of this one, but I think the license is only associated with the serial number of your device. In the future, we want to associate them with users, so for example, you could buy a license in one device (or MOD Desktop) and use it in all MOD devices you have. But that is not yet implemented.
No, you won’t lose any purchased license.
Some talk and work is being done by some community members about that can be found here: NAM A2 and Slimmable - #20 by fer
Enjoy your device and share with the community your experiece