Yes, because it's very simple. He told her she would get $500 for a date, she accepted and even says the fact she was getting paid so much was what piqued her interest right there in the post. Is there a literal signed with pen and paper contract? No, but that's not what I meant.

Specifically asking to be someone's sugar daddy means you PAY them for their time. Again, it's not literally written down, there are no guidelines, but that's just how the sugar daddy thing works. If you're looking to be a sugar daddy, you already know it. It's common knowledge. If you want to be a sugar daddy the girl will 100% be expecting you to pay money, regardless of what she does and doesn't do for you.

It's extremely simple. She offered a service (herself as a date), he offered to pay for the service. She provided the service to what I'd assume is a satisfactory degree and he refused to pay after receiving that service. I really don't see how she is in any way in the wrong. What he did was basically sexual assault and he took advantage of her. He tricked her into doing borderline sexual favors for him without her consent. I HIGHLY doubt she would have agreed to it if the offer was "Go on a date and cuddle/make out with me" instead of "For $500 dollars go on a date and make out with me."

You're missing the key part: He told her he would give her $500, he didn't. That's all there is to it. Sorry If I sound like I'm repeating myself, but again, if I told you "Hey, for $500 would you make out with me?" and you said yes, UNDER THE PRETENSE THAT I WILL GIVE YOU MONEY, and then I didn't, wouldn't you be pissed off and feel tricked? You would totally see that as sexual assault and it is. I feel like you keep ignoring that very simple fact: They both clearly agreed to an exchange, she kept her end of the exchange and he didn't. Hence HE is in the wrong.