I purchased grocery from Costco.com using InstaCart. I purchased for $172 and the receipt showed $130 from Costco. Another purchase made for $138 and receipt showed $106. Both these deliveries I got after 5 Days. Only then I realized that I was paying almost 30% delivery charges to InstaCart. On top of that I will not get the 2% cash back from Costco. So I am paying around 32% delivery charges to InstaCart. This is outrageous fee when compared to using InstaCart from Kroger. Since I am not getting the 2% Cash back, I am not going to renew my Costco Membership for $120. I am not rich enough to pay 32% delivery changes and $120 annual membership Card. Kroger is much more cheaper.