Scarcity creates itself when supply vastly exceeds demand: the constraint moves upstream from the product to the permission to participate, and whoever controls that gateway becomes the bottleneck.
2
Kit Harington replaces Nicholas Hoult not because there are too few actors or too few roles—there are millions of both—but because HBO's Harry Potter series creates artificial scarcity by existing at all, and the slot is now a scarce good in a world of infinite entertainment.
3
The winners are those who recognize early that the real business is no longer making the thing, but controlling access to the moment when the thing can be made—the spaceport, the production deal, the casting slot, the flight attendant's route bid.
When everything is available, control shifts to who gates access.
SpaceX is spending $100 billion to build a spaceport in Louisiana not because space is scarce, but because the gateway itself is. Shonda Rhimes doesn't renew with Netflix because Netflix can't make shows—she renews because the slot itself is the real estate, and five-year exclusivity is the currency that replaces money.