I'm honestly enjoying the concept: not one I've seen done in a hot minute (outside of probably a hentai or two, it's that barren), so I would love to see more.
I would also like to see an explanation into why the women are paid more than the men. I can kinda get why, since free sex + money versus the % of actually getting pregnant, but a deeper explanation would be good, as well as also showing some shy guy x aggressive girl pairing where he actually gets paid more than her. (but that's just my monkey's paw wish on the last bit)