The status quo is already bizarre. Meta is actively profiting from harming minors. The alternative (minors getting a payout by visiting harmful websites) seems pretty tame by contrast, and in fact puts an active incentive on Meta to stop letting minors be harmed by their software.
One would argue the kids got paid for finding a dangerous place and entering. Up to the building owner to prevent access. It’s a form of giant bug bounty.
I wish I’d be paid a 7k$ bounty for every website where I can find an underage vulnerability.
The key thing is these people will get older and no longer be in that age bracket so you are relying on future groups in that age bracket to know this loophole which will be some but far fewer I suspect.