From their status page
>The second path involves rolling back a recent change to the billing computation subsystem.
Want to bet AI code was involved?
User: "I want to improve the billing system to be more efficient and só we can earn more money"
AI: "No problem, let me change how we bill and fix the tests for the new increase in value"
>Spawning Sub-Agent: "Dr. Evil"
Is it still a bet if you have 99.999% chance to win?
Can I bet you 437 billion dollars?
I'm not a betting person but I am looking forward to the postmortem, whether or not AI was involved, and what their code to production verification stuff looks like now. This kind of thing should have been caught by automated tests.