Gwent is might be more susceptible to stream-sniping, since the cards in your hand don't change as much as other card games. Even setting a delay, it's possible someone could get some information about what you haven't played. It will still combat it, though.
I'm not too worried about this though, because if you have stream snipers, you probably have a strong following, and I'd take that if it meant I had to play against a few cheaters here and there