As we first discussed in late July, Amazon’s Kindle Unlimited subscription program — which relies heavily on the 500,000-plus self-published books that are exclusive to Kindle — has put additional scrutiny on how much the retailer will pay those authors to retain their loyalty as direct sales are converted into subscriber reads. On Monday, Amazon charged their gatekeeper-free environment by announcing more than $500,000 in bonus payments for August to a newly-ordained set of “KDP Select All-Stars.” The Kindle one-percenters — or rather, the top two one-thousandths of a percent — can receive bonuses of up to $25,000 each, on […]