Reading this and other threads, I am forced to the conclusion that there is no viable business case for third tier airports such as PIK and DTV. The staff and equipment required for international services can only be justified if there are regular movements all day,week and year. And the airlines have forced airports to depend more and more on revenue from concessions, and without these regular movements there is no business case for these concessions. It would be interesting to discuss what is the minimum number of PAX which would make an airport viable.