Recently I found a game that pays real cash for playing it.
There is a possibility to play for free and earn some cash or to invest some money and earn cash faster.
The game is real-life simulation, where you can fight, own slaves, run companies and many more possibilites.
I started playing the game, because it's fun, interesting and there is a possibility to figure the right strategy for you how to earn most money.
Here is a link to the game:
http://www.anno1777.com/index.php?i=169097
If you have any questions, feel free to write to me, I will try to help you out.