While these models have diminished in mature e-commerce and online advertising markets they are still prevalent in some more nascent industries. China is one example where Affiliate Marketing does not overtly resemble the same model in the West. With many affiliates being paid a flat "Cost Per Day" with some networks offering Cost Per Click or CPM.
This is like a free graduate level college course every month available just for the reading. And unlike most college professors, these guys and gals are actually earning in the real world. Michelle made well over a million USD last year from mainly affiliate programs,AFTER she paid her running expenses and US taxes. She sure didn't do it by reviewing bicycle pedals 😉
Now you’ve got many different options to start earning online. If you saw something that really interests you, try it out and learn more about it. If you’re really wanting to make a full-time income online, you need to be dedicated to learning how to do what you want to do. There are tons of free resources out there. You just have to search for them!