QUOTE
With respect to Content You elect to post for inclusion in publicly accessible areas of Zymic.com or that consists of photos or other graphics You elect to post to any other publicly accessible area of the System,
Basically it means if we feel the need to promote the content of your site, for example 'site of the month', we can use the graphics from the site to do so without paying royalties and without your permission, though it's very probably you would be contacted prior to this.
This excerpt clarifies this:
QUOTE
You grant Zymic.com the world-wide, royalty free and non-exclusive license to reproduce, modify, adapt and publish such Content on the System solely for the purpose of displaying, distributing and promoting the specific Zymic.com site to which such Content was submitted, or, in the case of photos or graphics, solely for the purpose for which such photo or graphic was submitted to the System. This license exists only for as long as You elect to continue to include such Content on the System and shall be terminated at the time You delete such Content from the System.