Why the pop charts went crazy

J Balvin's Mi Gente, featuring Beyonce (above), jumped from No. 21 to No. 3.
J Balvin's Mi Gente, featuring Beyonce (above), jumped from No. 21 to No. 3.PHOTO: REUTERS

Digital streaming has scrambled the hierarchies and the Billboard chart's new rules are being gamed by listeners and marketeers