Not sure that's quite the right model. Everyone can pile into looking up entries in the yellow pages online, and the more people find businesses, the more value

Not sure that's quite the right model. Everyone can pile into looking up entries in the yellow pages online, and the more people find businesses, the more value the yp has in it's base product vs the costs of buying an entry. The more people pile into a gym there becomes a point of declining value because you can't get on a machine and the room gets stuffier, conditions worsen. I think not finding other value enhancing propositions for the yellow pages is mostly about brand stagnation.