There is no reliable estimate but it seems almost certain that millions of individuals across the globe make their living selling goods and services online or working for companies that do. Somebody must have a money making system.

The internet is so huge and the ways that people interact with each other so complex isn't it more likely that there are many money making systems? Does the teenager selling xbox games from Hong Kong use the same money making techniques as the grandmother selling knitting lessons from Kansas?

There is at least one way they do. A money transaction occurs if and only if a person with a need for X makes a connection with a person offering X for a price that creates value in the eyes of the buyer. Sounds too simplistic to be useful, doesn't it?

Don't get confused between simple and essential. If you sold the best X in the history of the world but only 25 people a year ever wanted to buy it, even if you made the connection, then you would not have much of a business, unless those 25 possible buyers saw X as being very valuable indeed. On the other extreme if you sold exactly the same X as hundreds of other people, some who had thousands to spend every day on AdWords advertising, you probably wouldn't have much of a business future either because it's not likely many X buyers would ever make the connection with you.

You want that money making system that generates thousands a day? It's out there. But whether you buy it or develop it yourself you're kidding yourself if it's not crystal clear how that system will make that connection with the X buyers, and how many connections you will likely make with people who have the need and the money to buy X in a day, a week, a month. How much will each of these connections with a potential X buyer cost you, a day, a week, a month?