Updates were promised, updates are being posted:
This one is a look at all print (including Amazon) vs Amazon-only digital, bith trad and indie published. Raw data supplied.
http://authorearnings.com/what-write...-on-the-table/
One thing to consider is that these order of magnitude studies leave out the intangibles.
The feeling of validation for those that value the old school approach, the fire and forget simplicity of selling copyright control, the upfront lump sum payment for those that need it versus the control aspects and the extra time and effort spent contracting and managing freelancers on the other.
Different authors are making different choices for themselves. What Howey is doing is collecting and presenting data so the authors can make choices based on what the market really looks like. Some familiar establishment claims are being validated (or, more precisely, clarified) while others are proving to be...dated.
We'll have to see if this effort gets other ebook vendors to open up even slightly so we can get full market data.