The 300k figure was sales as of the first day, including three weeks of pre-orders. They did not drop from 300k/day to 37k/day, because there was never a single

The 300k figure was sales as of the first day, including three weeks of pre-orders. They did not drop from 300k/day to 37k/day, because there was never a single day that they sold 300k. They sold ~14k/day over the three weeks. The 500k figure listed here is delivered. There is currently a 5-7 day delay, which suggests there are a few hundred thousand orders not being counted in that figure.