We considered burning or staking the liquid rewards. They're actually going to be pretty negligible over the life of the program, so it's better to have some flexibility.
There will be no buying units with SPT. Our team have already started curating more splintertalk users, and there will be some exciting new features in our 2.0 release. We don't want to leak too many details at this time, though.
sounds good, keep on grinding Joe!