I thought the same way. Well, good thing is that WoAI still publishes new and updated packages, sometimes. Before I've made installations manually with TTools, and I could download every file separately, but nowadays I would appreciate the easy way.
That's actually the former Olympic Airways which operated until 2009. Olympic Air was founded on same basis but has different fleet and livery.I remember LOT has been available before at least, but the good question is why are some active airlines taken away from WoAI?