Yesterday was a big day in hip-hop. August 11, 1973, is regarded as the day hip-hop began, marking the 50th anniversary of its birth. It took about 20 years for it to catch on, but now hip-hop is the driving musical force when it comes to culture in many countries around the world.
There are marked differences in the way hip-hop fans consume music vs. their rock counterparts. Statista points out that while hip-hop fans tend stream music, rockers are still (in general) quite happy to buy their music–at least as far as the US goes.