Absolutely the fault of the tournament. For example in Game 9, the one I'm in, 3 players immediately made a super strong alliance. They all stuck together even though it wasn't the smartest thing to do. But it worked out because 1 player didn't play at all. Then after a few days another player auto-resigned. I can only guess it's because he didn't want to play from behind.
The way the tournament is set up, it doesn't encourage players to continue playing if they are losing. Thats a major flaw.
I feel like maybe a "double elimination" style tournament would fix this problem. By which I mean, positions 4-6 could progress to a loser's bracket? This would be a problem in games with low turnout, but if we could fix that problem, this would be the natural solution, I think.