I think yes, the best example is rewards for DUELs in MuOnlineWebs (website engine). I don't know much about PHP, SQL etc. but i think that if there's is and PK Ranking then there should be done PK Reward too.
You can try to install MUOnlineWebs 2.1.8 and give us some feedback if this can be done, because when you'll install this engine successfully, the custom SQL tables will import automatically.