Even in the phone books of old, you had ads as part of the directories... Businesses paid for those listings... Even today's equivalent, yelp, etc. are trying to sell add-on services to the businesses and can harm your businss if you don't pay up for the features.
Right, and in this new ad-free world, those things works not be allowed, and all businesses would be on a level playing field, with none privileged over the others simply because they have a larger advertising budget.