This info is mostly correct, however there are a couple of misconceptions that may change how you approach things…
The split of the party proceeds is definitely different, rather than the normal 50/50, when the limo is used. That cut goes towards covering the cost of the limo service, but does NOT go to the pockets of the drivers themselves. (Which would argue FOR tipping the drivers well). This extra cut necessarily lowers the amount that the courtesan takes home for her services. Although not an official surcharge, you can imagine that a lady might adjust her prices upwards to account for that.
Take home: Use the limo service if you like, especially if not using it would mean that you don’t make the trip at all…just realize that it is a convenience that will likely preclude you from getting the absolute best price for a party. It’s a trade off. You just have to decide what works best for you.
Personally, I prefer to drive myself, but it’s a fairly easy trip from So Cal. If I were flying into Vegas from the East Coast, it might make more sense not to bother with rental cars, directions to Pahrump, driving, staying sober etc and just relax and travel there in style.
have fun!
YB