For those who wish to know the entire process that led to the tagging of images using AWB to add {{non-free reduce}}...
The actual adding of the {{non-free reduce}} tags is the third and final stage of a lengthy process...
I am using the fileres: parameter in an advanced search like
https://en.wikipedia.org/w/index.php?title=Special:Search&limit=2000&offset=0&profile=images&search=incategory%3A"All+non-free+media"+fileres%3A>324+filetype%3Abitmap
That example will show me the first 2000 images in the category Category:All non-free media, which have the fileres: parameter >324 - fileres: is the square root of the pixel count - 324 = 105000 pixels.
- I First repeat the search that I did last time, using AWB in pre-parse mode (no edits made) - that gives me a small list (about 50) that are either new uploads or are the result of the template being removed (i.e. reverted). I examine the history of this small set to see if I have been reverted. If reverted I will then re-assess the image and try to argue it's case with the editor, if we still disagree then go to Files for Discussion - so far I have only had to do that once - see Wikipedia:Files_for_discussion/2017_July_29#File:TNA_Heavyweight_Championship.jpeg
- I reduce the fileres: parameter that I used before (by 2-5 units - to gain about 1000 extra files to review) and then do an advanced search in Wikipedia, so I can view the images over quite a few hours and see if I think that some won't reduce without extensive corruption of the image. If I see such an item then I will tag it appropriately with either {{non-free no reduce}} or {{non-free manual reduce}} - the choice depends on whether I think that no reduction is possible or some reduction (but not to the WP:Image resolution guideline) is possible. Only when all images have been viewed that I move to stage 3.
- I use the same list of files from (2) in AWB to add the tag - the setup is made to not add tags to files that match the RegEx (non-free no reduce|non-free manual reduce|Orphaned|non-free reduce|Permission OTRS|Di-|ffd) - thus not to add to
- a) Files tagged for no reduction
- b) Files tagged for manual reduction
- c) Files tagged for orphaned files to be revdel (while a big version is visible the search with fileres: will pick it up)
- d) Files tagged with Permission OTRS template - usually a permission from the copyright holder to allow use in Wikipedia at the uploaded size, but not allowing a free use.
- e) Files tagged for pseudo-speedy delete
- f) Files tagged for WP:FFD
- Then it just a matter of saving each file with the tag. Use of AWB is invaluable with the "skip" facility that matches the RegEx, and stops duplicate and unwanted tagging.
Currently I'm getting 99.8% of the files reduced without any complaints - and the vast majority of these have been sorted out with a simple discussion. Do talk to me if you think the reduced image is somehow too small and corrupted.