No. Not up front any way I'm aware. They get my email addy, which they'll use for future marketing initiatives in one form or another. (Side note: I used a diff addy from my Prime acct <-- not sure if they'd be connected in any way.) Evenso, in past WP always let annon users view min# of free views.

...to clarify: I'm not sure if there's any $$ connection between WP and Amazon/Prime. That's the only reason why I mentioned using a diff addy.