Prizes:
Streak of 1 correct result: 2500 Satoshis
Streak of 2 correct results: 25000 Satoshis
Streak of 3 correct results: 125000 Satoshis
Streak of 4 correct results: 5000000 Satoshis
5000000 Satoshis = 500 USD
The chance of hitting a match is about 9 per game is generally a chance of hitting 4 in a row = 6561
That is basically better than bounties for company promotion. 13 posts for less than $1
125000 = 13. USD
chance of hitting 4 in a row = 729
Even better 53 posts of a unique user for less than $1