// Get 3x update interval worth of pricing data. (Ideally the
// AWS API would tell us "we have shown you all of the price
// changes up to time T", but it doesn't, so we'll just ask
// Get 3x update interval worth of pricing data. (Ideally the
// AWS API would tell us "we have shown you all of the price
// changes up to time T", but it doesn't, so we'll just ask