As a boxing judge and trainer. I have seen my share of questionable judging and refereeing. I don't however think there is all that much of it going on in boxing today. It is even more unlikely in promoters and promotion companies. To much scrutiny and risks for that. No judge, referee, or promoter wants to risk loss reputation and income to do this. As a judge you only see 1/3 of any bout. The other two judges see the other 2/3 between them. That is 3 different views of the same fight. As a TV viewer you get to see everything a lot clearer than does a judge, so you get an even better view.
Marcos left the judges no possible way to rob him. He made it clear. If there was enough close rounds, he would of lost. They wanted to rob him, but it was just too obvious for them to try and pull anything. The ref was against him, showtime was kissing Broners arse.