The current #1 spot belongs to will.i.am & Britney Spears 'Scream & Shout'.
The criteria for listing includes "digital sales, number of radio plays, data streaming, and 140 club DJs who report their playlists to Billboard." (Source: mixmag)
If it helps some newcomers jump into the rabbit hole that is EDM then it shouldn't be discouraged. As it stands right now, the only use this chart serves is as a reference tool to track what producers are crossing over into wider top 40 radio appeal. The Beatport 100 will continue to dominate as the most legitimate chart for the foreseeable future.