I imagine that women (and perhaps drag queens) would be most likely to be accused of prostitution based on a condom count.
A large sum of money would probably be $1000 or more. If you look like a tourist, the chances of being stopped are next to nil.
We do have some dumb cops here, and some bullies on the force as well.
I have never been stopped for anything except traffic offenses, 2 in 38 years.