Ref's decision in BJJ makes no sense at all. A format without rounds and a martial art that emphasizes waiting for an opponent's mistake to make your move just doesn't lend itself to subjective judging. What's better? Set ups, sweep attempts, sub attempts, being on top, or just moving and pretending you're doing crap so you look like the more active competitor? It doesn't make sense.
I don't think having a 5 minute sudden death round or tie breaker would derail the torunament that much. But oh well. I really do think a competitor's personality affects fight decisions, but especially in the Brazilian dominated world of BJJ with this kind of subjectivity. Caio pisses people off enough that the vast majority of officials probably come in with a bias against him already.