How to earn money through SMS

I have discover a bulksms site for a long time online but that doesn't move to know how to make money with it but the day I discover the secret of having a bulksms site.
In having a bulksms site, you don't have to worry about yourself of knowing how to build a site, creating a database but all you need is to have your own personal system (any), and get connected to the internet. Is as simple as 'ABC', but the next question is 'How do I get the Bulksms?'