I definitely don’t want that directory to be skewed with ads in favor of those with the most money, or who have decided to burn the most of their limited resources on ads instead of improving their services, lowering their prices, or hell, just taking more profit. The ads were the biggest problem with the good ol’ yellow pages.

Banning advertising could actually make it easier for new entrants.

It's the big players who have the most money for ads, buy up all billboards, internet and TV ads, etc. A small shop can't afford to do that. If ads were completely banned (in all forms including the bulletin boards) then everyone would have to rely on the word of mouth not just small businesses.

I also think that fields like photography are just highly competitive regardless of ads so it's then mostly a networking game.