This was interesting. I do want to say that the second biggest ebook subscription, or at least a very large player, is Kobo--it's larger and more popular than Scribd. (It's a Canadian company owned by Rakuten with its own e-reader devices.)
I also think the title of the article is quite misleading, as there are thousands of authors who make seven figures independently publishing, tens of thousands of authors who make a full-time living doing the same, and probably 100,000 authors who make enough per month to cover a bill, like a car payment or their kid's soccer team fees. Books are selling and individuals are making money in KU. Independent authors are also using Kickstarter and website sales to make money directly from readers. A lot of that is untraceable by BookScan.
