This Steam user: "Captain Bucky O'Hare".
I watched his replay (he ranked top 2 or 3 on 2016-Oct-24). I couldn't see any cheating. But then, I watched at Blazing speed.
The next minute I looked, his name was gone.
Have I been watching and learning from cheating replays? 
(For reference, I'm number 2 on 2016-Oct-24 Daily Challenge. I used a terrible "cheat", an early rush strategy that punished the AI for spending early on Patent / Optimization and such. All because my snowballing debt didn't punish me enough.)
Then I looked back to 2016-Oct-10, and I see that user's name on the Daily Challenge board (number 10).
Do you guys use any automated ways to detect cheats? Do you need me to help craft such automated detection? (I can)
This game is way too fun. Never have I encountered a game where the AI is so able to respond to everything I do. Taking pathfinding (combat units) out of the game was genius! If there's anything I can do to promote this game, I will. Just let me know.