2008/11/3 geni geniice@gmail.com:
Massive Multiauthor Collaboration Site" (or "MMC Site") means any World Wide Web server that publishes copyrightable works and also provides prominent facilities for anybody to edit those works.
We do not provide provides prominent facilitiesm to edit images.
We have version history and re-uploading, which IMO qualifies even by a literal reading. We can point to numerous examples in Commons of files that have been edited to demonstrate this. The licensing clause does not specify the degree of technical sophistication required.