Steve,

One of the ways that you make money is charging people to run classified ads that appear in your magazine and on your website.

If the owners of this site think that it is ok for you to advertise here, that's fine. In that case, perhaps they should also think about allowing ads from manufacturers, publishers, galleries and photographers and from people who want to sell equipment. Personally I'd find such ads at least as informative as ads for your magazine and your conferences.