As with all disruptions, some will make out like bandits.
With the Kindle Unlimited, authors leveraging their books as marketing tools could reach more prospects, more members of the media, more Idea Entrepreneurs, and more current clients/customers who are reassured they chose the right player to do business with.
Kindle Unlimited, like the Netflix model, provides a subscription plan allowing members to access as many ebooks in the Kindle library as they want. All for $9.99. For this kind of bargain, even tech-phobic Baby Boomers will make it their business to learn how to navigate Kindle. Likely professors across all disciplines will explain to both colleagues and students the benefits of Kindle Unlimited.
However, there are also those on the losing side of this innovation.
They include writers whose end purpose is not customer/client acquisition. Instead it is to make a decent buck from investing their talent and time into producing a book. In Tech Crunch, Danny Crichton sketches out the bleak scenario for them. Just like artists got screwed when Napster, iTunes, YouTube and Netflix became the distribution systems, many writers could wind up unable to monetize their literary productions. Here is the Tech Crunch article.
We ghostwriters, of course, don't see Kindle Unlimited as a threat. If our clients are savvy about publicity, the low-cost access to their books can be a gift from the gods. The trick there, of course, is not only to have a book that's worth reading. It's imperative to do smart promotion.
Fortunately, push-back models are being developed for writers to be able to monetize their creations in a fair manner. Both those establishing the new models and the writers nurturing them become 21st pioneers.
One model, Crichton explains, is Patreon. Startups like Patreon, says Critchton:
" ... allow producers to build audiences directly and develop their own subscription model with their most fervent fans."
Kindle Unlimited will serve a certain kind of customer. Patreon et al. serve another.