There are four primary ways past customers drive sustainable growth: 1) Word of mouth. 2) As a side effect of product usage. 3) Through funded advertising. 4) Through repeat purchase of use. | The Lean Startup

Where Authors Reveal Their Truths.

Entrepreneur

There are four primary ways past customers drive sustainable growth: 1) Word of mouth. 2) As a side effect of product usage. 3) Through funded advertising. 4) Through repeat purchase of use.

-- Eric Ries