"The commerce of printing political banners is a delicate art. The sweaty season that could potentially turn Amit Dange's Kalyan shop into a "cold war" zone is upon him. Already, the calls have started coming in and soon, the men will arrive in herds, as they usually do. This is why, a board outside his shop now reads: "WhatsApp, Email and Facebook service will be charged extra. However, what seems to have caused a mild downfall of upto 25 per cent in revenue for these printers are increased competition and GST..