So have two e-editions with two prices, one that comes out early with the hardbacks and includes something extra... an additional short story, visual media, lack of DRM, whatever, and one that comes out later with just the main text. Or... just drop the price of the ebook when the softback comes out.
Price elasticity of demand curves are just that—curves, so dropping the price below $9.99 doesn't mean revenue will continue to grow. However, I won't buy their claims until I see their curve, and I bet it supports that dropping the price to $8.99 or even $7.99 increases revenue even further.
How many think that paying ten dollars for something for which the marginal cost is nearly zero is rather absurd? Virtually free replication is something for which capitalism is not well suited, hence all the manufactured scarcity we see.
In general I dislike the idea of sending your empty car back home to pick someone else up. However, doing that just occasionally is probably more energy efficient than manufacturing more cars so another one's in the driveway and only slightly adds to congestion. I understand the concern about driverless bombs, but it isn't that difficult to accomplish now. Mules? FBI might be worried there won't be anyone to arrest, but the human mule isn't a decent catch anyhow, and they generally can't lead back to the source any better than a driverless vehicle. Organized crime doesn't have a hard time finding human mules. Driverless mules will be used, no doubt, but won't much affect either the crime rate or the conviction rate.
A huge advantage of everyone having their own auto-valet will be the reduction in nicks and scrapes from the cars parked in adjacent spaces (OK, I'm obsessed with that). Auto-valets will also be able to park much closer together, so parking lots will not eat as much space. One issue I anticipate is a long line of cars waiting to pick up their drivers which have been summoned too far ahead of time. We'll have to have some method of limiting the waiting time at the department store's front curb. If you order your car too soon, after it waits a minute for you it will circle around to the back of the line. Ha!
Another issue will be that some pedestrians already walk in front of cars, assuming they won't be hit. Knowing the driverless cars won't strike them, many more pedestrians will walk in front of them, seriously hampering traffic flow. Somebody's going to have to arrest those jaywalkers. Barney Fife, we need you back!
UNIX was not designed to stop you from doing stupid things, because that would also stop you from doing clever things. -- Doug Gwyn