Yes, daily local deals. Mason was wishing for some version of Groupon that would affordably deliver 500k emails to people in SF for his local business Detour. Such a thing does not and cannot exist.

Sure it can. It may not be a startup with a billion dollar valuation, but not every company has to be.

You could probably make a pretty good living off something like that, especially if you can scale it to several local areas.

500k signups in an area is a lot to ask for, especially if your daily deal email doesn't have an interesting range of products like all the other daily deal emails...