I think a lot of people misunderstand what Groupon offers a business. Basically it's advertising, but in a way that makes it affordable for small businesses. The company offering their deal, is putting their name out there, and only has to pay for it when someone walks through the door an makes a purchase. Tradition advertising means paying for your brand to be seen. Magazines, newspapers, ect can target markets, but…
It would have been advertising if it had a longlasting effect. Consider that once you do a groupon for a 20% very hard to get that customer again for the full price of the product. So what do you get from the supposed advertisement? A single customer that may or may not give you his business again. That's not advertising. That's what's crassly known as 'opening your legs'.
>What do you get from this supposed advertisement? A single customer that may or may not give you his business again.
What do you get from traditional print advertising? Your brand seen by people, nothing more. At least with Groupon you get them through the door.