But a businesses like an advertising agency or coupon distributor is not a conventional supplier: It exists to create demand for things people don’t think they need. In times of austerity, it’s true that “organic” demand drops. But that can increase demand for businesses that create demand out of thin air.
When the class is full, nobody needs to distribute a coupon. But when the class is half-empty... Perhaps Groupon will get the call. Perhaps.
I am not endorsing Groupon, just trying to point out that since they aren’t a yoga business or a conventional supplier to a yoga business but a business that throws a lifeline to a yoga business, their economics may not exactly track yoga business economics.