She uses the high prices as a filter. Those willing to pay want her, specifically. The thing she's really been trying to find for the last 2-3 years has been a husband / sugar daddy. From her interview with Lex Friedman (among others) it is clear, when reading between the lines, that what she wants 'a man of high status' because status is the thing she's supposedly attracted to. But she doesn't believe in love, and her Poly nature is entirely there so that she can upgrade to someone better, should they come along. She's not dumb enough to say the quiet part out loud, but Lex does a good job of pinning her down with questions and she has no good answers to evade.
Part of why she charges so much (she claims) is to get rid of the shame of having fucked someone 'lower status'. She knows that someone high status would be offended/disgusted to learn that she fucked George the lowly IT worker. So, instead, she says she charges a high rate, and then, 'obviously' only people who could afford her would be high status as well, and thus, that new high status partner wouldn't feel like he was digging around in common ore. From a marketing/mentality standpoint, it does make sense.
If you're high status and you want a weekend with her, I doubt you'll pay 24k. If you're a nobody worker who pulls down 6 figures and lives cheap, you'll probably end up paying that 6k rate. That's just my gut feel though.
Or, to put it another way, she wants guys in that $100mill+/year range. At 1k/hr, that's 'only' 8.76 mill/year. So if you paid her to be your 24x7 servant, it'd cost you less than 10% of your yearly income. Like...that's nothing to those people. It's a rounding error to them. That is the sort of people she wants to be with long term, because she knows she won't be hot forever, and she wants to lock in with some guy who will make her not need to find a normal source of income.