I can't understand how it'd be profitable either; it seems woefully underpriced. Unless, as timdorr said, individual items are marked up 10-20%. When a family

I can't understand how it'd be profitable either; it seems woefully underpriced. Unless, as timdorr said, individual items are marked up 10-20%. When a family like mine goes shopping, it's for a cartful or two of groceries, and it takes an hour just to get all the items. Add travel time and checkout, it can be a whole evening. $3.99 for them to cover all that and bring my order to my doorstep just seems silly. So I have to wonder if there's a "cart size" limit, or there is a per-item markup, or they just really hope they get small orders!