Asking for no reason, just curious and couldn't find any clear info on it anywhere including forums. I'm sure I'm missing it being explained on the forum, and I searched, but if I have questions and I play all the time, maybe it should be posted in "The Game: Options" so new people know what to expect.
All I know for sure:
It doesn't appear before round 10 regardless in 1v1
I doesn't appear in multiplayer games, but does in polymorphic games. I feel like I've seen it pop up as early as round 4 in a poly 4 game that's going really badly, but I'm not sure. Poly 2 games maybe round 6? Again just guessing here.
It doesn't appear in tournament games, or clan games even if 1v1 (right?)
And the big question- It's been assumed in the community that after round 10 if you have half the troops, you get the resign option. But that doesn't seem to be the case. It seems to be higher in some cases, maybe region count is factored into the equation?
This is a fun post, I love the resign button and don't think it needs to be adjusted. But I've been speculating for a couple years and just thought I'd ask
