I've got one cite of it as the Perfect Prediction scam, but it doesn't seem to be a standard name.

This scam shows up in an R. A. Lafferty story, with the suggestion that if you're good at picking winners, you'll get a better return by not doing a fifty-fifty split at each stage.

I've checked some pages about types of frauds, and that one doesn't show up. I'm guessing that it's just too much work compared to other sorts of fraud.