Of all the markets over the world. Most data providers like Bloomberg,CQG,thomson reuters...etc. None of them consider NSE has a market to be profitable. I checked with some of them. They say they don't have enough people to subscribe to the NSE/MCX exchange hence it of no use for them to pay exchange fees when there are no or few customers.
Even Global data feed had to shut down Cash segment because of the same reason. So if an Indian provider is finding it difficult to run a business providing real time data , surely international business will have no interest, although esignal is an exception.
And to add to that just look at most people here, everyone wants either free or very cheap data providers and there is a illegal market for that(MT4 & ami data providers). These illegal data providers give incorrect and unreliable data and make profits from it.
Hopefully one day things will start to change...but that day is very far...