Can someone tell me how exactly Instacart is working this? Do they have an agreement with Costco? (I'm guessing not.) Do they have individual shoppers who just do their thing as though they were individuals, and then deliver? Are those individuals employees or freelancers?<p>I'm guessing Costco would be a bit reluctant to formally allow something like this, as I also presume that one reason they get lower prices from suppliers is that they only sell to members, so there is less of a perception that a supplier is undercutting other retailers by letting Costco sell at a reduced price. A sort of price discrimination... but if stuff gets resold without a markup to bring the price in line with other retailers it would make their negotiations more difficult.