Many people have tried to get runescape membership for free. Although the way they did it worked but now there is absolutly no way to get membership for runescape free and neither does Jagex give them away for free. So people have tried to find ways to pay for it only while earning the money online at the same time. There is one way where you complete offers, although that way is fast they keep calling you home and sending you junk mail.

The way i am about to show you is a bit complicated and takes time but if you are determined to get membership this is the best way

Awaiting update