all of dem

New subscriptions extend olds. In other words, yes, when you purchase the 3D Billard subscription your board game sub will extend up to 2 years.

thanks op, i have subscribed to board games. If i wanted to subscribe to tanx/billiards, would that give me 2 years of board games??

ty op for clearing this up

If you subscribe to four in a row, or any other board games, it is valid for all board games, but no billiards or tanx. 
If you subscribe to 3D Billiards or Tanx, it is valid for 3D Billiards, Tanx and all board games.

OP

When i subscribe to 3DBilliards it tells me im subscribed to these as well...

Snooker Light, 9-Ball Pool, 8-Ball Pool, Go-Moku, Tanx, Checkers, Reversi, Nine Men's Morris, Connect Four, Chess, Backgammon, Snooker, Go, Pente, Blitz Chess, FODBall.

As you can see Connect Four (four in a row) is one of the games you are subscribed to as well.

The Subsciption for Connect4 is valid for ALL FlyOrDie Board Games

   Checkers, Reversi, Gomoku, Morris and Chess etc...

billiards, tanx, chess, gemjam. there may be more