Tried to edit and add to my last post but missed the time window.

The alternate interpretation is that the statement "Commercial Images are welcome in the galleries" implies that commercial images are NOT welcome in site areas OTHER than the galleries.  If that is the case then following the reverse hierarchy an image in a signature that is commercial in nature (Pink Box), is deemed an unacceptable image by the rule (Orange Box), throughout all site areas (Heading).

 

My Renderosity Store
Virtual Furnishing
My Portfolio