Some airlines increase their ticket price by Rs 1000 from 4 April to 5 April

The domain investor was planning to travel from Goa to Mumbai on 18 or 19 April 2019. On 4 April 2019, the airlines were showing their price as Rs 2812 for a ticket from goa to mumbai.
In a clear indication that the surveillance is used for extorting money, on 5 April 2019, when the domain investor checked early in the morning the price for one airline was increased to Rs 4055, an increase of Rs 1243 overnight.
19 April is easter almost no one will be flying from goa to mumbai,the aircraft will be almost empty on 19 and 18 april 2019
So the domain investor chose another airline to fly from goa to mumbai which did not increase its price so much