You win some, you lose some. But that axiom of gambling is proving to be too volatile for many Strip casinos, which are continuing to shrink their exposure to high-limit games in order to reduce risk and ensure a steady profit. The latest case in point is the Hard Rock, which says it will no longer accept high-roller action from gamblers with million-dollar credit lines who have the potential to lose -- or win -- millions from the casino. Read more fro The Las Vegas Sun.