In this economic moat series, we’ve covered two types of competitive advantages: the cost advantage moat  and the brand moat . Now let’s talk about one of the most powerful economic moats in investing — the network effect moat . Imagine a business that gets stronger every time a new customer joins. More users make the product more valuable. A more valuable product attracts more users. And the cycle keeps reinforcing itself. WHY NETWORK EFFECTS CREATE POWERFUL COMPETITIVE ADV