What they should have been taking away all of this time — and have increasingly begun to — are the concepts of the constant beta and agile development,” he says. “Marketers need to abandon the time-limited campaign online and start to think of it as a constant application of a rigorous discipline. They should think of their marketing the same way that Facebook puts out a new feature every two weeks, tweaks it, changes it, and re-releases it. It’s not a coincidence that’s brought Facebook 400 million users and Twitter 40 million. We’ve been applying them to Kashi.com for three years now and have seen results beyond anything that a single campaign could do on its own.