Sales isn't necessarily a measuring stick for talent. Bodak Yellow has sold more than all of Salt N Pepa songs & now we have the City Girls, who make twerk music outselling Salt N Pepa, Funny thing is when 2 Live Crew made this sorta music in the 80s & 90s, it wasn't as popular since there were always better artists/songs at the time.

Simply put, there is no real competition nowadays.