I was comparing https://xtools.wmflabs.org/articleinfo/en.wikipedia.org/United_Nations_in_popular_culture and https://xtools.wmflabs.org/articleinfo/en.wikipedia.org/User:Pilaz/United_Nations_in_popular_culture and the latter doesn't display authorship data. What is the reason for it, and is there any workaround?
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It looks like its been that way since it was first added in https://github.com/x-tools/xtools/commit/e7f46030de93babbbdd311b2911f82a2f3fb24dc
We now have our own WikiWho installation, so it's theoretically possible that we could expand it to other namespaces, but this is extremely unlikely to happen. The storage needed just for the mainspace is massive (~5 TB across all languages we support) and adding the userspace alone would have a significant toll. Better we reserve that storage for adding other language editions. The mainspace is what most are interested in, so I don't foresee it being expanded beyond that. Most revisions on userspace pages are going to be the same author anyway. Sorry, we will have to decline this.
As a workaround, you could try http://wikipedia.ramselehof.de/wikiblame.php