Or maybe they do an initial public offering to raise the needed funds. It generates lots of revenue, though not necessarily profit. And our heroes become wealthy beyond any wild dreams of avarice. That's the pattern. Well, not always.
Some spectacular products fail because of one or many unanticipated factors.
Sometimes people imagine that obvious difficulties will be overcome, and they're not. Sometimes corporate management shoots down an in-house idea because it looks impractical, or it looks too hard to do, or it likes another idea more, or it feels nobody really needs it. And it becomes a fabulous success. Or a product works, starts generating revenue, even profit, then dies because more advanced technology kills it. It's a very bumpy road.