I feel like this is an upside down black market. In drugs you want to create marketplaces to control the flow of the substance. In sex you want to ban marketpla

I feel like this is an upside down black market. In drugs you want to create marketplaces to control the flow of the substance. In sex you want to ban marketplaces, even if you allow purchases and selling because those basically are too close to human trafficking or pimps, though you could create body guard and check in services to ensure sex workers get to an appointment and get back home.