b) Contract wise
Other factor is the number of contracts per day. As for as I remember Mr. Chauhan told on a Con call that they were planning to charge 0.2 $ per contract. So I had a look at this as well.
INX average contact volume is about 100,000. Just for the sake of argument, if BSE decides to monetise this operations, it could generate revenue of about 100,000 x 0.2 $ = 20k USD per day. Its not a big sum, but given that things are looking good, we can hope that it will get better with time.
Im sorry I had to do this in three posts, as Im a new user, I can attach only one image per message.
PS:
I have pulled the data from the bourses automatically and did the calculation with my own scripts. There could be some errors. If you find some Im happy to stand corrected.
Disclosure:
I have a sizeable holding in BSE and my views are biased. Please do your own due diligence before buying a stock.