I think if during a game someone (match games mostly) leaves in the 7th bcuz they're losing the remaining player should get a win! I play on-line pool as well and after a game starts if someone leaves they lose and i agree with that concept. What a waste of time it turns out to be.
You'll win if you patiently wait for the clock to run down and the game doesn't break down with "unknown error". Or he will win if you don't and he comes back in the last second.
Anyway, it will count against your completion %% unfortunately.