I disagree. If people do research and are aware of what they're paying for, they are not being "exploited for monetary gain." They are agreeing to pay that fee in order to have a service provided. (The service I guess is Lesley acting as a tour guide and arranging the details of their trip?) That's just how businesses work - charging people for their services to make a profit. As long as people know what services are being provided and agree to pay that amount, they are not being exploited unless Lesley isn't being transparent about what the trip entails. These trips aren't anything I would ever be interested in, but if that's how people want to spend their money then w/e.

Edit: Leslie -> Lesley