Actually, the source code is allowing to have 0.5% charity and not 5% due to another typo.
https://github.com/ThanksCrypto/Thanks/blob/master/src/main.cpp#L1980
https://github.com/ThanksCrypto/Thanks/blob/master/src/main.cpp#L1980
This is incorrect ...
It reason the code states "0.5%" is because their are ten charity scripts. So actually you have 0.5% * 10(due to the addresses) which consequently = 5%
We are looking at the issue regarding block value for rpcmining.
If you wish to solomine you can use the internal miner.... just goto to the qt console and type "setgenerate true 16" should start hashing away.
... Did not realize he needed to add the charity addresses. Should be fixed soon. 
