There are people who will say "I want to do this for this person in exchange for what they're offering me". There are people who will say "You can't do that. You're hurting yourself". Usually the people in the second group then leave happy having done their job of saving the people in the first group. Then the first group starves.

As a minor, I did all sorts of work over the Internet, and got paid fraudulently over Paypal. Boy am I glad child labour experts didn't get in on that shit. Moralists never really care to help.