Theranos is by far the most explicit example of "fake it till you make it" I've seen. Maybe that motto should be shelved in the future.
For example: Airbnb started out by scraping Craiglist for their listings. This was not only ethically dubious, it was against Craigslist's terms of service.
They got away with it, though, and have obviously gone legitimate since. Same with YouTube and copyrighted content.
No doubt. However, I personally don't see this as being at all related to 'fake it till you make it' as a concept.
cough Ubeam cough