Mark Castle, if you haven't come across him yet, can be best described as a wildcard. Everything he produces, usually rave-style dance mixes, is so terrible and faux-shocking the natural response is to look away. He's a wildcard because from time to time he pops up out of nowhere.
He has practically no subscribers on his youtube page, only a few of his videos have over 1,000 views and every time he does pop up on websites like reddit and buzzfeed people are making fun of him. Even among the mocking, most people simply don't care. I still feel, given his personality, we'll be seeing much more of him before too long.