Sub at table
 

Team A is about to shoot 2 FT's....Team B calls a T/O.......Sub was at table to come in before T/O was granted. Do you let sub come in at first FT when the timeout is over?? or do you make him wait to come in after the 2nd shot?? Thanks

Once the TO is granted, the sub is allowed to enter the game. Doesn't have to wait on the shots unless they are coming in for the shooter.

What's the purpose of making the subs wait? Is that purpose still relevant once the TO has been called?

Answer those and you'll come to the same correct conclusion that FBullock gave.