Viacom's frenemy, DirecTV, has announced that it suffered a net loss of subscribers for the first time in its history. The revelation came in its second quarter filing, which claimed that the exodus is actually a purge -- due to a tighter credit policy and a change of focus toward "higher quality" customers. The dip in numbers hasn't hurt the balance sheet, however, with revenues up seven percent to $5.65 billion, leading to a net profit of $604 million. This time out, there's no reference to the recently-minted
