Should we require the elderly to pay their adult children minimum wage for looking after them? Because that is far more like work than being a moderator on a website.
If the elderly person requires the child to wear a tee-shirt with and advert on, which the elderly person earns money off, and the elderly person is getting rich off asking the child to look after them for "good will" then... yeah, they probably should be paid. It's not charity, it's not family, it's exploitation.