There was an earlier comment here about complaints about new order delays on social media with screenshots. I suspect Tesla saw it too from the server logs and delayed the price hike.
I can very well imagine them seeing unprecedented peak order flow that broke or significantly slowed down one of their payment processing backends. You wouldn't notice it unless you were trying to pay with a credit card in the relevant time period.
Tesla could have listed half a dozen easy and true reasons for the delay, why are people like
@schonelucht rushing to accuse Tesla officials of
lying about the reason, without any evidence
whatsoever?
SMH.