Red Alert - Changes to First Data Bank AWP!

An eagle-eyed resource sent me this today:

We received information from First DataBank that it was no longer going to include the FET in its AWP calculation. We monitor the pricing publications and noted that the First DataBank AWP for June reflects that the excise tax is no longer included.

For those of you who have contracts who use FDB to set imms pricing need to jump on this with your payers to make sure that they continue to include excise tax in your calculations or you stand to have your reimbursements cut!
I'd love to know FDB's reasoning, anyone is welcome to clue me in.