I'm sure that the game is designed to tell who is active and who is not. There must be a time limit within the game that we don't see but alerts the game that this player has gone inactive. We really don't need to know the players last login date, only if they are still active. You have to admit, there are so many inactive cities and we tend to send invites to them, a lot! Just having a small tag in the score grid of players would really help to pick up those new players and maybe help them find a FS. It may be the key to keeping players active, to help them out with questions when they are new to the game. I didn't realize how important a FS was when I started and waited a while before joining a FS, what a difference it made! Just a little tip on who is playing would be so great!