In my experience in talking to escorts, the vast majority of clients want to bottom when they hire. One of my regulars actually is more of a bottom and has vers/bottom as his description on RM. Even so he told me that 70% of his clients want him to top.
To me it makes sense. I am not sure how is in other cities, but Denver has way more bottoms than tops. If I want to top, it's quite easy for me to find someone on the apps. But I very seldomly can find a good top on the apps.
That's when I find a great true vers escort....that's the best!