Jeff covered this in the post (GameDays, excessive amounts of auditing, etc.). Regarding the resource limits you suggest, they mention metrics of 50+ pB of data

Jeff covered this in the post (GameDays, excessive amounts of auditing, etc.). Regarding the resource limits you suggest, they mention metrics of 50+ pB of data movement and 3.34 trillion DynamoDB queries in 30 hours, all of which they elastically scale down after the event... so I'd say resource limitations are more in terms of humans on-deck and crisis management, rather than physical limitation of hardware. (edited to correct size - was 52 pB not 520 pB...)