Alan, I'll try to pin you down on this one. First, do you honestly think that "quitting while ahead" will contribute to your bottom line? Second, do you think it can turn a negative expectation game into something that can be beaten?
The reason I bring this up is because if it does either of these, you have busted up the laws of probability. Now this has consequences. You would be a very special person.
Basically, the only way you could accomplish this is if (1) the laws of probability are wrong, (2) you have telekinetic abilities that affect the RNG or other aspects of the machine, or (3) you are clairvoyant and know when you are about to lose.
I brought this up to Rob more than a year ago: the James Randi Educational Foundation has a one million dollar award for people who can demonstrate, under controlled conditions (of course), that they have paranormal powers. Make no mistake about it. If quitting while ahead has a significant affect on your bottom line, you have paranormal abilities.
If things pan out for you with the "quitting while ahead" strategy, I would seriously take a shot at the million dollars. It's free. You just have to sign something saying that if you fail, you admit to being wrong and having no powers.