Coupon Business Success?

[Chippie]

Has anyone had any success stories they can share regarding the coupon business?

I see many websites out there with coupons for products and services and was wondering how you manage a site like this.

Is there a service that you subscribe to that allows you to place coupons on your site in the way of a feed?

How about the old fashioned way, calling on local businesses and selling advertising packages and giving them 'X' amount of coupons on your site.

What are you all doing?

Chippie