This is silly. Funnels are a useful abstraction to measure and optimize conversion rates in a multi-step process. How you optimize the steps in the funnel (i.e. spam or not) is up to you.
The "upside down funnel" is really an example of a viral loop, optimistically shaped to imply that loving your customers is guaranteed to bring you more of them. But that is still worth measuring, and once the referrals get to the "try you out" phase, it's worth understanding the process by which they become loyal customers. That's what funnels are for.
The "upside down funnel" is really an example of a viral loop, optimistically shaped to imply that loving your customers is guaranteed to bring you more of them. But that is still worth measuring, and once the referrals get to the "try you out" phase, it's worth understanding the process by which they become loyal customers. That's what funnels are for.