For a few years now, with the growth of the Internet, Yellow Pages and newspaper advertising (especially classifieds) have been in a decline.
The Yellow Pages companies have attempted to deal with this by simultaneously increasing their rates and offering more deals. They have also attempted to get into the online marketing game with online directories such as RealPages.com.
It is a losing game they are playing as more and more businesses are finding Yellow Pages advertising just no longer pays for them.
Most businesses are spending more and more of their marketing budgets online. Intelligently spent, it is getting them the best return on their investment.