User blog comment:Rappy 4187/Technical Update: March 10, 2015/@comment-1251315-20150312231408/@comment-5590118-20150312233319

From Kirkburn:

This is a method we're using to help us target surveys at more active users. It is nothing more than a way to tag users that are more active on Wikia than others and has no real meaning otherwise.

Not taken verbatim.