Many of you received an email from Amazon this week which invited you to enter the “Win an Kindle 3G from Amazon.com” contest in honor of Amazon Prime, and, of course, and as you should, you were suspicious and are wondering whether it’s a scam. in fact, the “Win a Free Kindle 3G Sweepstakes” is legitimate! No purchase necessary, and here is how to enter (even if you didn’t get that email). You’ll need a Facebook account, as it involves the Amazon Facebook page, and that’s where the catch comes in.