Having met with https://rentmen.eu/HungVrsIvyLeague, I'd say whether he's worth of $ 500/hr or even a higher price tag is up for debate. I think he is worth it as he brought up something that only few people are able to. That being said, whether I am willing to pay at least $ 500 / hr to anyone given my budgeting right now is another question. With his rate, given the fact I have a much better option, seeing him again is not on top of my list.