I'm one of the founders of Per Vices. To confirm;
1. We are currently selling our device as test and measurement equipment. The intended use case is academic or research.
2. You're mostly correct about power - although it turns out that, depending on regulatory jurisdiction and the frequency or band of interest, power level can matter.
3. Actually, we're aiming for real time programming using gnuradio. You're absolutely right about the bursting, though - our initial programs were almost exactly as you described.
Long term, one of our driving goals is to drastically reduce the barriers (specifically cost and expertise) standing between the average software programmer, and a 'hello world' program that can usefully transmit information.