Tim Sweeney is buying creator marketplaces. The Github in each market: 3D (sketchup/artstation), 2D (artstation), music (bandcamp), etc. It's the Microsoft play, but for creatives.
He's trying to leapfrog the gaming industry and build a content creation engine that encompasses Hollywood, marketing, architecture, automotive, you name it. He's actively cultivating skilled creator mindshare and winning.
He's also trying to set legal precedent that siloed distribution marketplaces can't charge an arm and a leg and enforce draconian rules, because his play is a two sided multi-channel marketplace where he wins regardless of where you buy or sell.
The endgame for Tim is huge if it works.