Talk about a great analogy. Selling rocks vs a Subscription model to the biggest social network on the planet.
The size of the company doesn't change the fact that there are numbers smaller than 10%, 1% or even 0.1%.
Never underestimate the willingness of some minority of people to pay for the most ridiculous things.
I'm going to go sell rocks at a concert for $1m a pop. The concert is 100,000 people, if even 0.01% pays for them, I'm rich!