They'll almost certainly cancel it. Pricing errors like this happen all the time on Amazon, there are whole websites/subreddits dedicated to finding them. Usually they just cancel it the next day and maybe give you a $10 gift card.
Sometimes you get lucky and get the item, but the media's advertisement of this will probably exponentially increase the chance of getting your order canceled, unless Amazon has some crazy PR strategy.
Is that still happening? Do you have recent links of people getting gift card/credit regularly? Amazon seems to have stopped doing that largely for some time now.
Sometimes you get lucky and get the item, but the media's advertisement of this will probably exponentially increase the chance of getting your order canceled, unless Amazon has some crazy PR strategy.