of course, you will not make those amounts just by purchasing an eBook. the goal of the information that you pay for is to open a new way for you to look at the things from a different perspective. Same like you pay for a gym - you will not get a shaped body just by paying, you will have to WORK for that.
It works the same with eBooks/Courses, you will have to read a book over and over, train yourself, be dedicated, THINKING, and the $ will flow if you don't give up too fast. That's it. if you were asked me, there is ENOUGH content for free in BHW that you can apply and make bank without purchasing an ebook, but like always, if you will buy a GOOD ebook that the creator already does all the hard work for you - he already saved you ton's of time for research, how much money your time cost?