However there isn't any official statement from Bitpay regarding the impending fork. I want to make sure that if it happens I'll be safe with both the new coins and the legacy coins.
I believe that Blockchain is numbered among the companies in that one agreement, however Coinbase is not from what I remember reading.
Yes, IIRC BIP148 is an attempt to hard fork it if the SegWit concensus is not met (not sure if it's only SegWit or both SegWit and 2mb block). If that happens some says exchanges might choose one or another if not both. Realisitically we want to keep both the BIP148 coins and the legacy-main-fork coins.