The range of Rs. 1,500,000 - 2,500,000 per 'month' is limited to CXOs of Indian companies. It's way too high for designers or developers, primarily due to the cost of living.
Communicating the terminology in advance is very important. But, do hackathons fall under these legal requirements? A group of people working for n days without compensation.
Edit: Sorry about the misleading title. I just referred to a tweet and put this up here. Changed the title now. Also, there are some dummy contributions, like line edits and delete. But check out some cooler links with actual contributions and fun Github graph art.
Somehow, I felt wow. I am able to appreciate this because of the number of applications it holds - Tsunami simulation, Bridge and dam construction. And real-time? Full points!