Personally, I prefer to go to Amazon over shopping comparison sites for a couple reasons: I already have an amazon account so I don't have to create an account and put type in my cc info and I know amazon can ship quickly. I wonder if you can build a shopping comparison site that holds my cc and shipping info so that I can literally check out on the shopping comparison page...
why not dollar shave club for everything? yes you can buy onetime purchases but I need personal shopper that reorders. Here's everything I buy find me the best prices at the time of purchase and how often I want them. oops, I have too many of this hold off a week. And you have $5 maybe $10 per month to do it.