It's about the broken trust. Even if it's "nothing compared to x store fees" and the company CAN pay it, it is still a stinky move that would make anyone say "nope I don't want to work on an engine that would even think to treat me like trash".
Probably that is the reason I am not affected by this: There is no major company that I really trust. :) So no trust to lose. I only do the math and see that Unreal is way more expensive ...
