I think that GF too at one time had a 3 class A 320 layout?
definitely had a 3 class A320. I once flew it BAH-BOM back in 1999. There was no F so we business class passengers ended up in the F seats and the C seats were used to higher paying Y class passengers. I am pretty sure KU
does this on a few routes as well. Don't know why they think they need a 3 class A320, but I guess the "few" routes with F pax are worth it.
The only aircraft missing from my KU
list is the 320 so I can not comment on them, but I am pretty sure it is very similar to GF