Let's introduce happy hour with Christmas coins. Everyday activate the happy hour but announce when it will happen so everybody is pumped and ready for it.
How this will happen... It's simple, every snowmen you kill drops a Christmas coin. No, people wont get huge bundles of Christmas Coins because it's not like there is unlimited amount of snowmen. Only so many spawn after they have been killed. The amount of players running around killing them will balance things out and make things fair.