Robert Stanek said:
For me personally, I think it would far exceed expected fair use of a work if 10 people with 10 devices had 1 account, such that that 1 account allowed a single purchase to be available to all 10 people simultaneously on all 10 devices. You, on other hand, seem to be using the devices for testing and such, which is a different situation.
In general, I am in favor of authors protecting their work from piracy. Completely in favor of that.
But there's a couple things where I part company with you, in terms of agreement.
1) Paying a service to send out DMCA Takedown Notices via a monthly fee. Seems to me that unless someone is assured that such a company's reputation is ironclad (say, Webroot or McAfee or Vipre or someone like that, adding a specific author-protection service), the risk is far too great that the company saying "pay us a monthly fee to kinda-sorta help you" are the same people who own the pirate sites and are trying to profit off your content to begin with.
2) Your opinion (quoted above) that 10 people on 10 devices on one account might be a personal opinion, but there's way too many X-factors you're not taking into consideration. Like the simple assumption that each device = a separate user.
Using myself as an example, my wife and I buck the general trend in that we have separate Amazon accounts. Part of the reason for this is our very different tastes in books, and also that we met later in life (late 20s for her, late 30s for me), so we both already had Amazon accounts when we got married seven-plus years ago.
But in today's tech-driven day and age, even if we DID share an account, it'd be VERY easy to reach your arbitrary target of "10 devices" being "too much."
For instance, I currently own:
1 Kindle PaperWhite
1 Google Nexus 7 tablet
1 Samsung Galaxy SIII phone
1 Asus laptop (Windows 7)
1 Dell desktop (Windows 7)
That's not counting the fact that I had a K3 before I had my PaperWhite, and had Kindle apps on at least two previous PCs that were either replaced or died. That's 8 devices, easy, five of which I actively use. And yes, I've deleted out-of-use devices in my Amazon account via Manage My Devices, but still... just little ol' me has FIVE active devices that either are Kindles or use Kindle apps.
Additionally, I've been contemplating adding a Chromebook to my lineup to reach six active devices all by myself. And I would be deeply ticked off if I had to pay again for a book I've already purchased.
And because I understand this, I never limit devices per purchase when I publish via KDP.
None of these include my wife's devices. Like me, she has several:
1 K3 Kindle reader
1 Samsung Galaxy SIII phone
1 Acer Android tablet
1 Desktop PC (Win7)
1 Old laptop PC (Win 7)
1 iPod Touch (iOS)
So she has six active devices all by herself (and hopes to upgrade her Kindle to a PW2 soon)
And we don't even have kids yet.
Two people... 11 active devices that could become 12 if I buy a Chromebook. (Because I plan to keep my old laptop until it's completely broken, not just a bit slower than it used to be.)
So, yeah... all I can say is... 10 or more devices doesn't always = 10 or more users.
(Aside bit of trivia: Affordable virus protection programs are VERY hard to find, for us, because of the amount of tech we each own. Companies think they're being oh-so-benevolent with "1 year, 3 device" pricing, but that's not always so... Same goes with MS Office. It's to the point where I have Office 2007, while my wife uses Office 2010, because we would need FOUR licenses to just own one version or copy, and Home and Student only offers three licenses per purchase.)
So, yeah... be careful with those assumptions on devices. It's pretty easy to reach 4-6 actively-used devices per user.