Giving away money?
Ok I will bite... do you have too many PPC or is PPC in that dire need of full nodes?
There's no huge need for full nodes, at least that I'm aware of
It is mostly for encouraging people to use Peercoin on Raspberry Pi, though having new full nodes is obviously a nice benefit. We have other projects involving Raspberry Pi too, and due to Proof of Stake we are looking towards a future where the entire network could theoretically be maintained and secured by low-end efficient hardware.
It is also good for promotion as it gives newcomers a chance to easily get some PPC