I don't think it's a good idea. People don't really shop around Uber, Lyft or Sidecar. Most people make their decision to use one predominantly or exclusively. Same with drivers. People aren't going to Kayak through every $5-20 decision to save a buck. Especially when there are other important variables and brand promises.

And the premise is a little insulting in that I'm supposed to feel like an idiot for having picked one provider.