In my view, it is undesirable (and unnecessary) to build rewards for promoting BBR into the protocol itself, even for a limited period of time.
Incentivising devs to continually improve the code base I understand. However an online game like Popboolr can (and should) have a model that is self-financing or (worse case) donation based rather than having its funding built into the currency.
How will popboolr be financed? It seems very worthy of donations to me. Of course if you a clever way to make the game self financed and profitable that would be even better! If you have competitive reasons for keeping this secret for now I understand.