How do runescape gold selling sites make their money?

I bought 40 odd mill of an rs gold selling site a few months ago and on their front page of the website, they mentioned "...billions of gold in stock ready to sell to you!..."

so i was like how the fck did they get billions of gold?????????????????????????????

does anyone know the method they use to get money

Best Answer - Chosen by Voters

I think they have many and many farmers, of course, A few site boting or stolen gold, so if you want to buy some gold, choose a safe site is first.
they mentioned"...billions of gold in stock ready to sell to you!...", maybe is just a ad, not really have billions, lol.
i just got 40M gold from thsi site:

http://www.guy4game.com/runescape-2/?aid=1897

Runescape Making Methods:

My favorite ways are:

1. Fishing swords until sharks and selling

2. Cutting magic logs and selling

3. killing unicorns and selling their horns for 2k each (you can work on combat while making good money). Those are the ones i use most. btw dont turn into a leeching troll and ask for "free stuff".