Why do transexual escorts cost more?

[virtualflowe]

In my part of the world, time spent with transexual escorts cost about 50% more than cis-girls.

I wonder which one of the following is true?
1. There are fewer tgurl escorts - therefore they charge more because of the scarcity of supply, or
2. Tgurl escorts don't get as many clients as cis-girl escorts, therefore they have to charge more to earn the same per week.

Whaddayathink?