Cheaper API for accessing live NSE Data

#1
NSE and BSE says that Data feed is not free and it is nearly 20 lakshs per year .

My question is that there are of websites ,mobile Apps which actually show live data on their User Interface .

Do they pay such huge amounts ??

Or is there any small pricing avialable .

I am in plan of making a open source Mobile Application , for which i require live Data , tried YQL but it is buggy .

Could you please suggest me any cheaper API ??
 

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