As a registered member you have the possibility to canvass "friends" and earn money for doing so. For every canvassed "friend" you will receive a 5-euro credit note on your next bill and that every month as long as your "friend" remains registered. And your "friend" will receive a bonus of the amount of one monthly contribution, which will be credited on his first bill.
As you can see: Good friends are worth their weight in gold.
Be Informed!