I've monitored my bills closely and so far no fishy charges.
This is a PR disaster for Monoprice. Especially since their target market is highly technical people. They dropped the ball big time. I feel torn though. Monoprice is one of the vary few places to buy reasonably priced cables. Still, they're going to have to do a heck of a lot to win that trust back. They can start by admitting the f--ed up by not notifying their customers.