The change from tiered rates based on volume to flat rates is fine with me. The bigger problem for many people will be that the rates are also being cut overall

The change from tiered rates based on volume to flat rates is fine with me. The bigger problem for many people will be that the rates are also being cut overall in many categories, at least for people doing non-trivial volume. For example, previously the affiliate payout for books was 6%+ if you sold at least 7 a month, while now it's a flat 4.5%.