We came up with some new guidelines for the Godot Showcase page. Feedback welcome: https://github.com/godotengine/godot-website/pull/917
@emi_cpl right, totally agree on that only games with measurable success should be showcased and nobody should expect you to consider every game. perhaps the point of the showcase page can be elaborated on a bit more like:
"we're proud of every game made using godot, but unfortunately can't feature them all. to best showcase the engine and its capabilities, we're looking to feature games with measurable success." etc
I guess my point is that I hope you can soften the blow a bit ;)