I don't think it's that the 'real' authors are losing page reads so much, but that the mega-scammers are manipulating their read counts into millions of pages per day (but nobody's actually reading, just clicking through), which pushes the real reads further down the scale for bonus eligibility. I saw Amanda Lee mention she estimated losing about $40,000 in Dec/Jan. (Over in your favorite forum.
) David Gaughran also posted an update that he's had a long talk with someone at Amazon and they're supposedly seriously looking into the problem reports.