Everything and every business, no matter if they are free or not, needs some investment to maintain them. If you get a car as a prize on a contest, will you ever load it with a fuel yourself? Or are you gonna wait for the car company to load it for you forever?
You need to spend some money to make money.
For example, with spending just 2$ once, you will get 5tc and 50mrp for free every month... So, do the math...
