Originally Posted by
PiperAtGatesofDawn
No bugs required. AI has gone back to allowing you to enter other airlines FFP details at the time of booking. I don't have an active booking with them so I can't check if they allow you to add it to an existing reservation. I suspect they would now (but with AI there's no telling!).
This only works when you are booking directly on their website or app. And it still doesn't allow you to change your FFP number after booking. Changes can only be made at check-in. In fact, AI's website backend doesn't even accept SAS' FFP numbers for their highest tier (Diamond), which begin with "EBD", and they have to be manually added by the check in agent.