It think for some dommes the rate is part of their branding, and Mistress Oksana may fall in this group. There's someone also like Mistress Seren (four years experience as a professional) in New York, who talked a bit about this in an interview I watched of hers. I believe she charges 1K/hour too. And someone like Danielle Blunt charges first-timers 4K for a three-hour session. For some of these dommes, there can also be either an overt findom element to some of their practice or else a gentler encouragement to view the relationship as a lifestyle-adjacent one that involves supporting the domme more broadly, not just by paying for session time.

Ironically, I think it's the dommes who are extremely technically experienced who often charge less and work within more of a pure-session mentality. (Although Blunt I'm sure is very technically skilled as she's had a very long career.)