We have, or at least used to have, several other Atlasians who were frequent Wikipedia editors, no? IIRC Verily and Emsworth were.
Assuming Emsworth was Lord Emsworth, he was even an admin there, tho he apparently went cold turkey at the end of 2006.
Of course, he might have done as I did. I was a fairly frequent editor (close to 50K edits, many minor tho) when I got fed up with the Wikidiocy of some of their policies and just quit. I still did occasional IP edits there, mainly fixing typos I came across, but then I got hit by a block on IP range because of vandalism some other idiot(s) were doing, so I got another account [the issue that cause me to quit my first account had not been resolved] and resumed editing at a much more sedate pace. I was logging over a thousand edits a month (and could probably have gone for admin if I'd been interested as I was approached a few times) on the old account. In he past four years on my new one, I've done a little over a thousand edits total and stay as far away as practical from all pages in the Wikipedia namespace.