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by scoofy 1280 days ago
It means you can only sell the product on a case-by-case basis, and it does not scale.

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.