I think you misunderstand.
I'm not asking about an op-up for myself. I'm wondering if they normally op-up BF pax to GF in order to make room for oversold coach. I think that's ok for a thread.
As for me personally, I am hoping that this is true as I am on the standby list for BF, so if they op-up the current BF pax, THEN I will be upgraded with my GPU (not oped up).