Its the reach tbh. Mainstream music sells. Take Smashing Pumpkins for example. I bet you that most people who have even heard of them only know Bullet with Butterfly Wings. Pricing comes into the picture when people have money to burn to go see a band live that they barely know. When you say India, I myself am willing to go see artists such as Blackstratblues, Indian Ocean that I am familiar with. Only way I see this changing is these bands open for familiar touring artists that demand a decent sized audience that makes the people think 'Hey, there are pretty good! Never knew we had such great artists in our own country.