The rules are simple...
You have to purchase as much as you can.
The competetion will end in the end og this month..

The 1st winner will get 50% back..
The 2nd winner will get 40% back..
The 3rd winner will get 30% back..
The 4th winner will get 15 referrals.
the 5th winner will get 5 referrals..

So keep purchasing...