I always thought the idea of a reverse booking was to get high priced prossies to wiggle there prices down to fit your bid.
People do use them for this but if that’s the only reason you’ll often be disappointed. They have other uses as well:
Really specialist services or specific fetishes.
If outcall, you can get interest from people a surprisingly long way away, sometimes from people planning a tour, sometimes people who genuinely just don’t mind travelling.
They can be a good way to head off the possibility of extra charges by agreeing everything at the start.
Overall I see them as a way to self-select people who are willing to match my price (sometimes that’s expensive girls willing to cut their rates, sometimes it’s people who are travelling and I would never have thought would be willing to do so), and also you can start to get a view of whether they are likely to be reliable from exactly how they respond to your RB.