What is the meaning of 'scalable' here? Popular/widely-known?
Author: scalable. One book can be sold to 1 person or 1,000,000 with little extra work.
Barber: non-scalable. One haircut can be sold to 1 person, but not 2 people without doubling the amount of work.
What is the meaning of 'scalable' here? Popular/widely-known?