On the reversal of the trend of world policies regarding Visa on Arrival policies, where all the countries are trying to open their gates to get tourism going. Turkey is deciding to go in the opposite direction. They are deciding to go backwards and implement e-visa system for many countries
From October 26, 2018, Turkish will be stopping visa on arrival facilities for many countries and India is one of them. You have to get e-visa before departing for Turkey. Turkey charges $45 to acquire the visa. However E-Visa through VFS shall continue.