Originally Posted by PHLGovFlyer

...Checking IAD-LHR shows all the award buckets with a mix of values in the R, O, N, I, and X buckets. The E bucket is 0 for all the flights however.

All in all it seems that Seatcounter’s provides a different set of values depending on what you’re looking at. It also seems that the E bucket on seatcounter may not always reflect the true NY (1k only) inventory for domestic flights.