TBH that's the most galling part of the Optus response to this, which was basically 'yeah we've done an investigation and it turns out that our paid subscription service shat itself because of the amount of people logging on to use it'.
It's the f***ing World Cup. What did they expect?
(tortured simile) It's like selling 50,000 tickets to a game in a stadium that can only hold 30,000 people, and then acting surprised when everyone actually shows up to enjoy the service that they've paid for.