The member post made by Barakobryan makes a lot of sense and a precaution especially when it comes to minors. In addition, I do not wish to sound like an overprotective parent but children in general should not be exposed in internet marketing without the proper knowledge and supervision by parent or guardian for safety and security reasons. This is the reason why there are laws enacted to protect minors.
We are all fully aware of cyberbullying, scammers or people who prey on innocent children,syndicated crime/kidnapping, drug trafficking, even maniacs. Giving the children the liberty and the chance to be exposed in such shenanigans and learning from mistakes may have more harm than good and can even traumatize them for the rest of their lives. Some may say such incidents are isolated cases but they are happening. The bad elements are real and taking every opportunity to get a victim either the child or eventual target, the parent.
A five year old is at that stage of development where he has just started preschool. Sense of right and wrong is normally molded by his parents and later by school teachers and classmates . Curiosity and exploring is at its maximum and they mirror what they see . They are learning to be less self-centered and accepting NO for answer. Play is an essential part of their wellbeing. Same is true with children 6-12 years where they are greatly influenced by peer pressure since half of their waking hours are exposed to outside environment. I believe they are not mature enough to make proper decisions, dealings especially with tricksters. Remember the warning most parents say to their kids: "Do not talk to strangers."
The only participation I can think of for the child in internet marketing is when he is the star, talent or endorser in line with his interests and skills, as what is happening in most vlogs or online business / work but accompanied or supported by parents.
Earning online is a good opportunity for the kid to understand the value of work and personality development. The child should realize schooling is still TOP PRIORITY and getting a college degree is a privilege.
In summary, parents should play an active role in monitoring and guiding their children’s development until they reach adulthood. In fact, being a parent is a never ending mentorship. To allow them to work at a young age is a discretionary. Afterall, parents know what is best for their kids.