Here an small example if how to scale a very big betting app with a team of 2.
http://highscalability.com/blog/2014/7/7/scaling-the-world-cup-how-gambify-runs-a-massive-mobile-bett.html?utm_source=Server+Density+Updates&utm_campaign=bf76583ec1-Sysunday_182&utm_medium=email&utm_term=0_7d8792a1ef-bf76583ec1-77634413
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