Its still not gone hurt PowerMan HBO really came for STARZ. Power had the summer to itself traditional TV the summer was a hiatus period reruns and more reruns. HBO old CEO, now STARZ new CEO, position Power to fill that void of no new shows in the Summer. It prove to be a jackpot with the ratings. Now HBO is in full attack mode, moved its heavy hitter game of thrones with it's 2 new black shows ballers and insecure to the summer, to wart off STARZ penetration.
Most of Powers audience is Black and Latinos(all races of them in seems).
Insecure might do something regarding BW. but most siesta to stay on top of both.