If you build it - will they come? In case of a modeling site on the internet they may, but with thousand of modeling sites its unlikely that you will receive a steady stream of photographers and agencies without actively promoting your site.
You can have an super site - a great portfolio - flash - dash and a bit of pinash - but it is up to you to help photographers and agencies find it.
At the Models Port, we are always working to promote models and photographers. And one of the best ways we found for reaching photographers and agencies is by listing your site with a modeling - photography top site - banner exchange site.
Modeling - Photography Top Site - Banner Exchange
How Do Banner Exchanges - Top Site Lists Work
Basically, all banner exchanges - top list work in a similar fashion, you list your site with the exchange - top site list for free and you place a link to the exchange on your site. The more visitors the exchange received from your site, the higher your site is ranked on the exchange - top site list.
New Listings on Banner Exchanges - Top Sites
New listing on banner exchanges - top site list, tend to receive a higher amount of visitors to the site, since most banner exchange - top site lists tend to feature new site listings.