I think we as consumers, especially those of us that enjoy Stardock's games, need to remember that what is beneficial for Stardock is beneficial for us. If there is a clear business reason/advantage to using Epic over Steam, and the inconvenience to us is minor, why wouldn't you support Stardock?
I'm going to reiterate that I can not understand the grandstanding by some Steam fanboys on this issue. It makes me think of the asinine Xbox versus Playstation arguments.
Personally, I'll gladly take a minor inconvenience if it means Stardock has more resources to make the games I enjoy. I'm not even sure it is an inconvenience at this point with the size of Epic's market share, and it will only become less inconvenient over time.