how does modeling agencies find work for their models?

Answer 1

the get phone calls from people who need models and then work out a price.

Answer 2

Whenever an advertising agency ,or a cloth designer needs models to shoot an ad or participate in a fashion show, they contact the modeling agencies,and search for the appropriate model from a series of portfolios.
The reputation of the agencies depends on the quality of models they have.
They do not search for clients, they search for models,while clients choose the agencies.

Answer 3

Hi, perhaps you can try Google adwords to market your service/product.

Google adwords is a text-based system for advertising on its site and its partner sites. The service allows you to create your own ads, choose keywords to help match your ads to your audience, and control the cost of your advertising—you pay only when people click on your ad (a cost per click plan). Anyone wishing to promote a product on Google can enroll in this program.

you can get a 5 detail pages information about Google adwords at :

http://www.adcenter.net.cn/google-adwords-1.html

Good Luck && Best Wishes!