Happens to me daily. Not that I know where they are from, but many times a day people let the timer run down to near zero before playing a card. Usually happens when I do something that hurts their strategy or whatever. I know it is roping and trying to get people to forfeit out of frustration/waiting but I usually just surf the Internet on my phone when they do this.
They an easily fix this, if the timer gets to a certain point in the countdown, then the next turn reduce the timer to start the countdown and repeat, eventually they will run out of time to play a card or have to pass.
I see a lot of players jumping around their cards, bouncing between two until the time almost runs out, just sitting waiting, or waiting for the timer to hit almost zero and playing a card and then dragging out the decision where to place it, etc. giving them even more delay. Pretty lame. But they don't get a GG from me and like I said I occupy myself with other stuff if they do that.