Indigo has found out a new way to beat their clients after beating them physically earlier. After you book the ticket they have started charging for each and every seat in the aircraft.
They also block the ones at back so that no one can book them. They are fleecing you left and right for each seat from Row 1 till the end of the plane.
This is so serious - looting the passengers at each point of so called cheap tickets. Living upto their expectation of being CHEAP