Funnel vs flywheel

Funnel ends at the sale. Flywheel uses the sale to drive the next one.

Definition

Two contrasting growth models: the funnel pushes prospects one-way from awareness to purchase, the flywheel reinvests each customer's success into new prospect acquisition.

Step 1

Predict first

In one or two sentences, what do you think this concept means? Wrong is fine; the small struggle is what makes the answer stick.