Cake is a commodity. I don't have to buy it from a vendor that specializes specifically in wedding cakes.

I should have set the premise up a little better: I can go to my local supermarket (2 9s) and order several cakes of different sizes, and get a fancy serving tray, to get the multi-tiered cake appearance that's classically what I think of, when I think wedding cake.

If my supermarket doesn't give me exactly what I want, nobody would really care, since most people don't go to supermarkets to by Enterprise Cake. They go with a more specialized vendor (5 9s).