Was it the same ref for 500 and 1000th?
In the 500th the ref is Paul Collier.
He is a well established ref. He was in the 2016 Word Championship Final as well.
Ronnie is definatelly sarcastic about the ranking points. In short the story is that O'Sullivan doesn't feel like entering all the ranking events, as he thinks that there are too many and one after another. He feels like it is exhausting going deep in a tournament and travel at night to be at the next one 2 days later (or even the next day). Barry Hearn says he is free to enter or not enter tournaments at his (Ronnie's) will. While this is true, not entering a tournament means no ranking points, therefore dropping in the rankings. This is why basically Ronnie is not ranked n.1, because he doesn't feel like entering all the tournaments. But this means he might not be qualified to play on invitational events because of his ranking or, have to qualify for other events, which in O'Sullivan's eyes is unfair because he is the best player and shouldn't have to prove this to "empty arenas where no one is watching" (referring to qualification events)
O'Sullivan has even proposed a "break away tour" so he will be able to play in more reasonable schedules (in his view).
So in the interview he is clearly making fun of the current ranking point system and he is showing how Barry Hearn wants players to think and act, that is chasing ranking points.