Earlier quoted context omitted.
Hmmm. Only an "idiot" would talk about sales? Patio11 - http://www.kalzumeus.com/2012/12/29/bingo-card-creator-and-o... Nathan Barry - http://nathanbarry.com/2012-year-quitting-job/ Brennan Dunn - http://planscope.io/blog/giving-up-a-million-dollar-consulta...
A handful of people from thousands who prefer to keep quiet. Plus only those who do talk about them do it to help themselves (as a marketing tool). Any time you talk about amazing sales you risk alerting your competition about your niche.
I read all four of the blog posts. All four of them make the majority of their money from consulting or from training -- books, videos, and workshops -- rather than from products. The split ranges from around 50/50 to almost 90/10.
In 2012, Patrick made 20% of his income (not revenues) from products, and 80% of his income from consulting and training, primarily client engagements. (He did not disclose revenues from his second product -- but careful reading of his blog suggests that it probably has not quadrupled his product income.)
In 2010, Amy made 32% of her revenues from products, and 68% from consulting and training, primarily workshops. (The 68% has to be split 50/50 with her husband, but even after splitting it in half, it's still 48% vs 52% -- with the majority coming from consulting and training.)
In 2012, Nathan made 18% of his revenue from products, and 82% from consulting and training, primarily books.
In 2012, Brennan Dunn made 13% of his revenue from products, and 87% from training and consulting, primarily consulting. Interestingly, he took Amy's course and did a 180-degree reversal of direction.
They have all discovered that the money is not in gold mining -- or even in selling shovels to the gold miners. It's in giving presentations about gold-mining, and selling videos teaching them how to pan for gold. Patrick wrote about wrestling with his conscience before charging for his expertise, but ultimately discovered that it tripled his income. They have all turned their blogging popularity into cash -- and that's why they continue to blog.
The people who are making most of their money from gold-mining are not blogging about the location of their mine.