I'm sure XL did Santorini a few years ago and from what I can remember the loads weren't hugely impressive.
TCX used to do Izmir for a fair few summers, if I remember correctly, and again mustn't of been hugely popular as that's now been stopped. I think including that with the fact there's a big increase on Dalaman and a slight increase to Bodrum it made sense to cut the route.
I might be wrong (usually am) but again I think someone previously did Thessalonki (perhaps TOM?)
Anyways don't think there's a market, as someone has mentioned, for charters. I've been wrong before though!