Thinking more generally than just insurance, there are a lot of things I buy on a recurring basis which, if I just allow my current providers to have their way with me, tend to get more and more expensive over time. Lawn weed control/fertilizing is the example which comes immediately to mind. I'd love to set-up a profile of my lawn with a site which would then allow providers to quote me prices for services semi-continuously. This would keep my current provider in check.