HOW PEOPLE REALLY MAKE MONEY VIA INTERNET?

People won't give out their best methods due to the possibility of saturation. The best thing to do is to get creative.

However, a good place to start is the /r/workonline subreddit. They have a bunch of useful posts and in the sidebar they have a bunch of information.

It requires a bunch of work on your part but if you absolutely must work online and don't need to make too much money you can make it work pretty easily.