[Reere]

I've played against players who-

- Type 'gg', 10 seconds later type 'maybe not'

- Type 'gg', keep playing till they have 0 units left

- Type 'gg', and in chat type 'has left the game'. And only leave the game when last building is under attack.

IMO just keep playing your best till your opponent actually leaves the game. If you GG but keep playing, it's just a grey area of manners.

Positive you can call it mind games, negative you can call it blatant BM~