Glad I read this.
I as having trouble buying the premium and opted for the regular.
Surprise surprise, when I went to upgrade not 10 minutes later i would have to pay first price.
I'm not willing to let 4.95 credit sit while I upgrade when I just wanted to evaluate one months service. I'd rather wait for the book to be released on Amazon.
Btw, I'm only really interested in one book, and at the price difference, I'm better to wait.
Why did I opt for the regular? When submitting my card all it said was card declined. Not insufficient funds, not invalid exp, not wrong security code, but just declined.
This was problematic for me as I use a pay as you go preload card for online purchases, and I'm converting to USD.
$14 Canadian should have been enough... now it looks obviously wasn't as the regular went through just fine.
*Edit: My issue was covered on its own support forum entry, thanks!.
It gave me an immediate credit on the upgrade.*