Instacart's biggest issue is not knowing real-time inventory. Amazon will never have this issue, because they just bought Whole Foods. Instacart, on the other hand, relies on crowdsourced shopper data to manage this.
The results is basically a hit and miss experience. My guess is they hope to get this inventory data direct from the stores one day, but who knows if they will.
The results is basically a hit and miss experience. My guess is they hope to get this inventory data direct from the stores one day, but who knows if they will.