There have been other examples of this.
I don't know that I particularly have any stance on it as such. Calling it prostitution is one thing; but that's legal here, I believe it is in Germany and it certainly is in one US state.
The nub of it for me is the same here as it is elsewhere. Is she competent and consenting? She certainly seems to be. She seems highly intelligent and enterprising, actually. You could put a feminist argument that she's selling a commodity - her virginity - to the highest bidder and thus making herself a sellable object; but for one thing much of contemporary feminism isn't notably sex positive (and is blatantly hypocritical when it comes to sex work), and for another, surely that applies across the board to anybody who has to sell their time, skills and labour to earn a living.
I dunno. If she's comfortable and safe - genuinely so - have at it.