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It looks like just adds for Coke Cola company... What is the general point of the system?

You could buy shares and get interests:
Cost of 1 share: 0.015 BTC (10 USD)
The income from 1 share: 0.00006 BTC a hour | 0.00144 a day | 0.0432 BTC a month
Payback period: 10 days
Or you could get free shares for watching that ad (basically doing nothing, just clicking, you could even make a macro that do that)