The author describes the notion as a 'sop to publishers'. Anything but! I'm not the only publisher who thinks free browsing is not only a tradtional reader right but a vital promotional and marketing tool.
I would hate to see the 'search within' rights withdrawn. Amazon's whole concept is customer-centric and this would go right against their policy.
And Amazon doesn't need sops to publishers. They make the rules as they go along and publishers must like it or lump it because the organisation has become key to treebook sales.