I have until midnight tomorrow night, and as my Monday weight is almost always higher than my Tuesday weight, I have a small chance of winning, but even I would put it at about 1% now. I am not going to do anything ridiculous to get there.
As I said before, this will still have been a worthwhile experience even if I don't win, but winning is better than losing.
Still, in the long run, it's all about pushing those red and blue lines down on my graphs. And no matter how tomorrow's weigh-in goes, I can continue to do that.