Who makes these choices?

Hi folks, I'm a long time user of Chordie, but have never delved into the community.  However, there's a little thing that's been bugging me for a long time, that being the question, "Who decides what songs go under which category?"  For the best example, look under "Christmas."  Today, the top 20 list includes "Wake Up Little Suzie," "Walking in Memphis," and "Creep."  Really?  Creep??  How is THAT  a Christmas song?  I think someone's messin'...

Oh, and the photo over "Blues" - yes, nothing and no one epitomizes the blues like a skinny, nebbish white guy...XD