But a more subtle form of prostitution exists on some of the superyachts which provide a floating home during the festival for Hollywood executives, film companies, and millionaire film fans.
Models, aspiring actresses and some Instagram influencers are invited to parties or to stay on board, enjoying champagne on tap.
But the unwritten expectation in some cases is that so-called ‘yacht girls’ will have to thank their hosts by having sex with them or other guests.
While there is nothing as vulgar as a price list, they can expect to round off their stay by being given a plain envelope stuffed with cash.
Back on dry land, the rules are simpler with escorts charging customers by the hour, and increasing their usual rates for the festival because they are in such demand.
Many can rely on boosting their earnings with tips and gifts, particularly from wealthy Middle Eastern clients.
MailOnline found one escort outside Le Majestic hotel at Cannes which is known for its celebrity guests paying 2,000 euros a night for a room during the festival, compared to a normal rate of 395 euros.
Assume anyone you see in a movie these days had to pay the price to get their role.