There's going to be even more of a feeding frenzy on this, after the latest HFP article methinks.
Is there any risk with buying in line with the promotion but switching (later - day before travel even and well after the 10 day award deadline) the FF number in the booking to a BA one to enjoy the status benefits if you have it there).
I can't see a problem here, except maybe a few less avios earned through flying depending on what you actually book.
Thanks