Because Prime Paid heavy amount for the early release. 36+15.5 = 51.5CR is a huge amount for the OTT Release. The budget is 135CR approx and according to the buzz it has already collected approx 200CR Gross World Wide. Also the collection is decreasing slightly, it's a good move by the team, for an (IMHO) average story walla movie.
Plus it's Streaming on two other platforms for the overseas audience through Tenkotta & Simply South. That's an extra money in their pockets.