Also university students from Asia that go to the UEA
UEA has what, 4500 students? Say 10% of them are from Asia and they all fly via AMS to NWI. That's 450 people flying in and out of NWI 6 times a year or 2700 passengers a year. And that's assuming they all fly in and out each term which is highly unlikely.
OK, a contribution to a route and it all helps, but not a real game changer, imho.
(UEA student 1975-1978)