Apparently the Day9 team likes hard-to-search-for spellings, in addition to arythmic music or tracks with unconventional beats.
Really, credit goes to the DKs who track down these songs and maintain the playlists. I don't know if others help out, but I know 1opinionated and LeahTheShadow have done a lot of the work. This community is built on all you awesome folk that make things, try out ideas, play games and have fun!
(forum glitched out, hopefully this doesn't double post)