My favourite one of these is a one-day-a-week restaurant in Wellington. They were closed Mondays, 'till the owner met an Ethiopean immigrant who'd always wanted to run a restaurant. Now it's Thai 6 days a week, Ethiopean on Mondays. The only Ethiopean restaurant in New Zealand, best I'm aware.
It's also fairly common among NZ craft brewers: the bigger guys with the equipment rent out their equipment some of the time to startups.
I'm sure the clips sites are already using advertising as revenue stream. But that pays the clip sites, not the content producers. I still think we'll wind up with a segmented market with lower tier product having commodity status and being shown on the clips sites, and a small number of celebrity performers who can earn money either through touring or by selling off props from their performances and such.
Some really neat ideas in the comments here though for other business models.