I was scrolling through my badges today and noticed that beside the "Archaeologist" badge, it said x0. I checked SO and there was a plausible number beside the same badge but not on Programmers.
I'm not seeing any number beside the badge.
Given that the requirements are:
Edited 100 posts that were inactive for 6 months
(emphasis mine), and the more ephemeral nature of posts on Programmers as compared to Stack Overflow (for example), I'm not surprised that there are no recipients of this badge. There are only 189 recipients of the badge on Stack Overflow with its 3,000,000+ questions, four year history and many 1,000s of users.
The thing to do is compare the number of "Excavator" badges (Edited first post that was inactive for 6 months) that have been awarded. It's 260 here on programmers compared to 15,244 on Stack Overflow.