Although the anonymous emailer is a bit histrionic, there's little doubt that Amazon is getting into publishing to put pressure on the publishers. It's just business as usual.
I have to ask, though: How exactly will it be an improvement, to go from 5 big publishers cranking out Snookie memoirs, to
one big company that publishes, markets and retails Snookie memoirs?
Small and medium publishers won't benefit, because it's only a matter of time before Amazon either pushes them around, or starts to eat
their lunch as well.
This is not to say the world will keel over if Amazon gains yet more leverage in the book biz. Just be careful what you wish for...