[stevekemp]

Fetish based dieting advice. I'm serious.

In brief you need a market of "kinky people", and you need a market of people who wish to lose weight, stop smoking, or similar.

You agree on challenges, you "punish" them if they fail, or succeed, on a case-by-case basis.

Very hands on. But there are a subset of people who will be in your target audience who are extremely wealthy..

[thenomad]

There's already an exercise equivalent. Google "Slavercise". Appears to have lasted a few years at least...