I'm looking at the prices for escort services and I'm surprised because some girls offer their services for more than $1000/hour. Is this a joke or are there really people who will pay that kind of money?

You should be aware that escort is a special kind of service that should not be cheap. If you want to call a girl with a low price, there are other types of services for that. In December I called an escort girl from https://allescorts.com/ who has a price for one hour of $350. I think this is a fair price because it is a completely different experience.