Many people developing UE games need 3D assets, so Epic bought Quixel, a 3D asset store:
http://www.cgchannel.com/2019/11/epic-games-acquires-quixel/
Also people need to share their 3D models for colleagues, marketing, fans, etc. to look at. Quixel was using them internally anyway, so Epic bought Sketchfab:
https://www.epicgames.com/site/en-US/news/sketchfab-is-now-p...
And people want to create their own 3D assets, so Epic bought the company that Quixel was using for 3D scanning, called Capturing Reality:
https://www.epicgames.com/site/en-US/news/capturing-reality-...
And now you can go from reality to virtual twin to realtime 3D visualization without ever leaving Epic Games' servers.