How Many Games Do You Have to Play to be "Active"?

Although I have ratings in almost all the variants, only in a couple of them can I see my own rating and ranking on the Leaders Lists.  Up until a couple of days ago, 3Check was one of them, but now when I go there, I don't see my own information.  I assume this is because I haven't played it in a while, and the list says that it's "Active" Players.

So, how many games do you have to play of a variant to be "Active"?  I played about a dozen games of Giveaway Rapid yesterday, but don't see my numbers when I go to that leaderboard.

I am guessing that the same standard applies.

That might explain most of it, but I've never been on the 960 list even though I played probably at least 50 games of it recently.