and when n I don't know...
The extension announces its presence in the game in the chat box before the first move.
Any player in a Point Counter Game can type "!status" in the chat box to get the current score. Similarly, any player in a game where at least one player has the extension can type "!details" for the current counts of all cards for each player.
Further, if your opponent has selected the "allow disabling" option, YOU can disable their extension in the first five moves with "!disable". If a player has NOT allowed disabling, their status message in the lobby will include "Auto Count" so you know to avoid them - or just play "no point counter." So you CAN avoid these players.
So if you are playing against an extension-using player, it won't (shouldn't) be a surprise once the game has started. All in all, the current implementation is very community-friendly.
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But to get back to the original topic, which I think is at least more likely to be resolved to the satisfaction of all players...
Just had two games where the other player "resigned", even though they were playing quite rapidly. Any further info on this new behavior from Iso?