How is yearling badge calculated on (per site) metas? In particular, what is used as reputation? I would expect that the upvotes from meta are used here, bud this does not seem to be the case. (The description of the badge is: Active member for a year, earning at least 200 reputation. This badge can be awarded multiple times.)
For example, I have noticed that many users have received this badge on (relatively new) mathoverflow meta. Some of the users having this badge don't have any post on meta for that site, so they cannot have any upvotes to their posts there. I have also noticed several users with no posts having this badge on meta.math.SE.
Based on this, I guess that rep from the main site is used. Is this the case? Does this mean that this badge will be awarded more-or-less at the same time on the main site and on meta?