Most forms of stud poker, in contrast, are open games, because some players' cards are dealt face up or are exposed during play (blind stud games are an exception).
A player who closes the betting round by calling or overcalling is entitled to greater freedom by doing so, since he does not face the threat of subsequent raises.
This is especially true when comparing limit hold'em games with a standard cap (3 raises) to an elevated cap (4 raises) or capless game.
A player can cap with as much as 80% of his flat calling range when he knows he cannot be forced out of the pot and no opponent can make his hand appear much stronger by raising.
This is particularly correct when closing the action on the river in Texas hold'em or on the 7th street in stud poker, where a player can call down with hands that are unlikely to win simply because of the pot odds he is getting and the fact he cannot be bluffed out of the pot.