Membership-based delivery services are beginning to disrupt the $600 billion-a-year grocery industry

The cost and complexity of delivering groceries is what ultimately led to the downfall of Webvan and other startups that have tried to disrupt the $600 billion-a-year grocery industry.  But a new wave of promising delivery startups are relying on a tried-and-true model to disrupt groceries: membership. Membership grocery services help secure consumers as repeat customers and allow companies to lower individual shipping fees on every order. Shipping fees are typically a big barrier to grocery d...