I've been looking for redemption availability for a flight to the US recently, and of course most of the time there is absolutely zero available Yesterday however a flight was suddenly showing 7 redemption seats available in First. I'm not interested in First redemptions so didn't book, but today the same flight is showing zero redemption seats in any class. According to Expertflyer it is still F8, A8, so it's not that they suddenly sold a load of First seats. Instead it seems that the "dynamic allocation" of redemption seats has decided that there should be 7 available yesterday but none today

This just makes the whole redemption booking process even more frustrating than it surely needs to be. Phantom availability, "book now before we change our minds", combined with the general lack of availability certainly compared with eg. KL which I am also checking. These days I am burning Avios on domestic AA flights, where there is still reasonable availability, and have pretty much given up hope on long-haul BA.