There's no such thing as a revolutionary startup idea.

Ideas become revolutionary only in retrospect, when the product or service becomes so good that it becomes obvious that this is how it should have been done. You may be associating the term "revolutionary" with solving a difficult problem, like nuclear fission or biotech. Obviously the more difficult the problem, the bigger the payout. Scale seems to matter, because we wouldn't call marginal products revolutionary.

A successful startup is one that solves a problem, and (eventually) makes money.