News reports today indicate she was fined $10,000 and allowed to continue play.
Some pros remarked the line judge was too late in making the call, but IMHO, a litany of liability falls on Serena and little to none on the line judge.
(Would you want to buy a racket from a manufacturer which Serena smashes into a million pieces on the court?)
$10,000 isn't even ten bucks to her. It isn't even a handbag. It might be a pair of shoes.