In my opinion daily deal sites, like Group-on, are an "acquisition machines" and maybe every local business has to try them.If the CAC (client acquisition cost) is less than the CAC of other acquisition tactics, i think that daily deals can be a right investment, at 2 conditions:
1. Local businesses have not to reduce the customer experience to still have a markup in the deals
2. They have to see daily deals like a chance to give a test to their services, so they have to deliver their best effort, not a low cost version of their services
