Availability on any given city pair on FI seems to be all or nothing. I've noticed on ANC-KEF and SEA-KEF as an example ..one day there will be 4 seats open (which seems to be FI'S max) for months at a time ..the next day ..everything will be 0 across the schedule. FI's ff program is kinda pathetic, and AS is their first partner ..so I don't think their Revenue Management has much experience with this yet.