TK
Great news on the daily+ IST service.
I doesn't surprise me that TK, as a full service carrier gave the route a chance to develop. In the old days (pre Ryanair, Easyjet et al) it was always reckoned that a new route needed up to 2 years to develop - and generally carriers would give a reasonable time for a route to achieve profitability. TK have obviously reached the point where the route will be come a fixture a little ahead of the 2 year point.
It's such a shame that FR / EZY cannot be as patient, but patience is not an attribute in todays business - whether commercial aviation or other sectors.