I got it recently but have not played with it very much. It does look like you/Admin would create the guidelines of the advertising (ie; cost, location on site, pay-per-click, pay-per-day, etc). The Organization would submit their ad (text, picture, etc) and fill in the frequency/time period portion of the guidelines they want, then it's up to you/Admin to approve the submitted as and allow it to run on the site.

The ad submissions are handled within the module, would not overflow into the pictures or any other categories/modules.