I called the number back using a landline and got the following voicemail: Hi, this is Julie with Rewards Redemption. You recently visited one of our affiliate sites and in appreciation we have a $100 rebate voucher...." - SCAM!!
Same happened to me, and I see that some of the posts are from last Spring, 2015, so I see they are still at it. I'm surprised that they haven't been busted yet, especially since this has been going on for some time. Thanks to all for sharing, especially to you Pudge.