Earlier quoted context omitted.
Not in the industry, so pure speculation. Unreal Engine's old business model were exactly that, get you excited with demos and sign up ( paid ) for their engine. And it was the same with UE 3 and UE 4. But in 2015 all that changed. It was open sourced on Github, it has a very sustainable revenue model due to the explosion of Mobile Gaming, the Gaming industry as a whole is now bigger than Movies and Music industry co…
FYI though, It's not open source. Open source has a meaning and Unreal doesn't fit that meaning. https://www.google.com/search?q=open+soruce+definition
Please accept my sincere apology. And no offence intended.
Let hope we continue to focus and amaze at the technical marvel that is UE5.