That's what so great about making money online. You set up a simple site promoting various money-making programs. When people visit it, click the special link given to you by the main site owner. If people read through it and like what they saw and read then they will make the purchase online. The owner make a sale, you got paid your commissions. Even though, you don't have your own produts or service etc. You can still make money!
Take a look at my site here as an example of how I make money even while I sleep!
You can also opt to sign-up and join me and create your own website. All you have to do next is to promote it anywhere and everywhere 'till you make a sale. Cool money eh!
Well, good luck and good fun!