Absolutely no reason for it to be free. It's there to deter minors. Devs don't need parents coming after them with lawyers.
And you think that kids can't get on pc or mac? It should be paid on all platforms if the point is to deter minors
Well if you want, we can do that
PC and Mac computers aren't as popular among children. They're often shared family devices. If you think those two are as accessible and personable to children then I have some swamp land for sale.