With Google Shopping Express & Instacart as well as the Postmates and DoorDash's of the world - I keep wondering...at what scale do these become huge businesses? Especially Instacart and GSX - they have someone go shopping and bring stuff to my home for $4 and for free right now. I guess it's user acquisition land grab + demand aggregation? And then they can go the route of private labeling the best goods and ultimately own the customer and then charge higher prices? They can't possibly make real $ at $4 per delivery, can they?