Fortnite, besides having their own issues, also have the issue of "secondary whale-chasers" which is all those youtube videos proclaiming that they found a hack to enable a bunch of skins or similar for free. This means installing (what I assume to be) bitcoin-miners on each twelve year old's machine. You'd think that wouldn't be possible on a machine used by a twelve year old but Epic is extra helpful in that it basically requires its game launcher to be run as admin (because of its frequent updates to Fortnite that requires admin rights). So I assume most parents make their kid's account admin out of convenience.