Hi Tom,
We often struggle to find just the right word that fits the space.  With somewhat unprecedented web jargon we all tend to make up words.
 
So here's our rational for Favorited.  Where Favorite is an adjective, Favorited is a verb describing something that someone has added to their Favorites.  It's actually becoming quite common.
 
To look at Favorite Cards would be your own favorites, but your cards that are others Favorites makes them Favorited.  
 
Are we all confused?  Did I sell you on it?
 
Maybe we'll put it to a vote at the office and see which way it goes    It was deliberate but thanks for questioning it.  
 
Mindy