I can't speak directly about any removal of images except from the producer forums. In those forums there is a storage limit, although it is a very generous one. As time goes by it IS necessary to remove material to make room for more. Establishing an archive would consume the same storage as would simply expanding the storage limits, so I doubt if that would be desirable. Creating an archive would, if not under the control of the copyright owner, create copyright issues unless the owner provided consent. This would be true for artwork, fakes, and drawings as well as photos and videos.
All that being said, producers often do re-post specific material from time to time, especially if there is a specific request.
Frederick wrote:I've noticed that some pics in certain topics had to be removed due to space issues.
I was wondering if it was possible to set up an archive, or set of archives, for those lost pictures?