There are (were) ~5,000 employees at Epic. That seems like a huge number for company that has produced little more than various flavors of Fortnite and a failure of a store in the last 10 years.

Do keep in mind: they also develop, maintain, support, and market Unreal Engine, which is possibly the most advanced and innovative game engine out there. It’s used by tons of other studios (including AAA) and is used in other industries like space flight, automotive, etc.