Perhaps, but how many copies of your book Authority have you sold? 50 success stories is a tiny fraction compared to the number who have bought a high-price book targeted at ebook authors.
Then, when you consider the hundreds of thousands or millions of people who tried selling ebooks without buying your book to help them, it's clear that the OP had very atypical results.
Then, when you consider the hundreds of thousands or millions of people who tried selling ebooks without buying your book to help them, it's clear that the OP had very atypical results.