I THINK, that it is another way to exploit the children. Parents do it for money or low selfesteem, but they are misleaded by some perverts who like to watch small children dressed as a hooker. Like in boxing, there are promoters who are greedy, and here is same story, promoters creating contensts to make money of the show and Parents.
I some cultures people are EATING their own children, in others they sell them to brothels, in some they SELL them to the shows. SICK children trade.