But why should somebody pay up to 50$, just for informations you could find everywhere... (if you are smart enough to search for these...)
Why should you go University, when you can just read books on the subject? Heck, why read books when you could just do the research yourself? Why buy food, when I could just grow my own in my garden? Quality insurance, and convenience.
Now, "Why should somebody pay":
A) You
can't find all the information "everywhere", since it's based on my own case studies and tests.
B) It's entirely true that you could track down
a lot of the information yourself. If I can, so can someone else, I'm not Jesus. So why pay? Well, first off, because you won't need to spend months digging through forums, videos, and blog posts to piece all the information together. Instead, you watch neatly categorized videos, explaining each topic in easy-to-understand lingo.
So to sum it up in a single sentence: You buy it, because it includes information you can't find elsewhere, and saves you from spending months researching it yourself vs just using 3 hours.
As an example of various free information, there is a great thread here by ConnersCraft. Now I do disagree with him on some points (and believe I have the numbers to back that up), but it's still a good thread. That thread contains what would be roughly 5-10 minutes of video, out of the 3 hours of video in the Advanced course. My point? There's a lot of stuff in there, in the courses, that you won't find everywhere else.