Phone books are a waste. I bet that's an industry that's really taking a hit, yellow page advertising.
Except, it doesn't seem like it actually is hurting, since there's a proliferation of phone books. It was probably a hugely lucrative business when there was one phone book per region.
Now, even though it would seem like there's an end in sight for this kind of business, all kind of competitors are fighting for the last lumps of all those fat profits, like sharks chumming on the carcass of a dead cow.