I don't want the success of my game to ride on paying my game's protection/engine licensing fee. It's hard enough to make money with a game and Unreal makes it harder.
By all means, if you don't like the terms don't use the engine, but it's hard to take it seriously when you make it sound as if you're doing them a favor using their engine for free.
Businesses should study their markets. Sadly, many people in the market are completely fine giving away things to get shiny, even giving up revenue. So until standards of customer treatment rise, we'll be dealing with various levels of SaaS.
Except some of us just aren't buying anything, due to the terms and lacking perceived value.
If Unreal works for you that's fine. Why do I have to like or buy it?