I created an index to the store of the day program. I created the Store of the Day as an effort to fund open community calendars (eg, Salt Lake or Denver Color).
Rather than putting a ton of ads on the calendar, I can have automatic links to the Store of the Day. A store of the day feature also lets me have an active rss feed for the directory.
This system does not give me enough money to hire a minimum wage clerk to maintain a calendar, but it pays for hosting. Lets see, there's currently 469 stores in the Store of the Day rotation. The system shows 324,567 page views on this feature since 2004.
At current ad rates, one is lucky to make a dollar per thousand page views. Since these are ultra targetted ads, I am probably making $5 per thousand page views.
An extra index for the feed might increase the traffic.
Sadly, this is the closest I've come to creating a working profit center for a web site.