actually the wiki is available under cc-by-sa if not stated differently, so nc-images are included with their regular terms and do not rely on fair use (depending on the interpretation of “commercial” in the jurisdiction).
Was there some legal consultation on this?
the OSMF as owner of the wiki was a commercial entity under UK law the last time I checked. Publishing images in they wiki might be defined as commercial use, as the business purpose of OSMF is to grow the database. It receives significant amounts of funding.
I would feel better if we have images licensed under an open license like the rest of the pages.
Is there a list of images being removed? How hard is it to get better images from the community under a more suitable license or asking the original photographer to change the license?
I am trying to do it with images at Finding new images for OSM Wiki - help welcomed! - #43 by Mateusz_Konieczny (link to last post)
no (though CC-BY images definitely require attribution and we cannot just use random images pulled from internet at OSM Wiki, unless we are allowed in one way or another - and yes, we have serious problem with both)
CC-BY-NC is more of a gray area
maybe? that would require impressive lawyerese to go with that interpretation, but I have seen less silly interpretations being uphold by courts (or treated seriously by lawyers, to say nothing about what lawyers claimed to treat seriously because it benefitted their client)
but I would say that this specifically is not a problem, I would still go for replacing them for “I would feel better if we have images licensed under an open license like the rest of the pages.” reasons.
https://wiki.openstreetmap.org/w/index.php?title=Special:UncategorizedFiles&limit=3000&offset=6000 has images without any category (so also without license template) - many of them just need to be marked properly
Category:Media without a license - OpenStreetMap Wiki has files marked as missing template, many are rescuable or waiting for reply from uploaders
https://wiki.openstreetmap.org/wiki/User:Mateusz_Konieczny/cleanup lists cases where uploaders were notified long time ago and file still has templates that action is awaited (some classes of files like screenshots are skipped here)
Category:Labelled for deletion - OpenStreetMap Wiki has files labelled for deletion right now
Category:Deletion Proposed - OpenStreetMap Wiki - deletion proposed
Category:Attribution not provided in CC license template which requires attribution - OpenStreetMap Wiki - attribution missing or not specified by using template
(see also User:Mateusz Konieczny/notify uploaders - OpenStreetMap Wiki )
Recent changes - OpenStreetMap Wiki for latest edits at OSM Wiki (you cannot show just ones removing images)