Rcvd call but no vmail. Blocked tel#.

I received a phone call on my cell phone today from this Missouri phone number even though my phone number is on the "National Do Not Call Registry." Unfortunately, the caller did not leave a voicemail. In order to find out what the caller wished to speak about and leave a detailed complaint at the National Do Not Call Registry's website, I dialed #67 and blocked my number. Once I heard a dial tone again, I called the number back. Seconds later, I heard a recording which stated, "Hi this is Julie with Reward Redemption. You recently visited one of our affiliate websites. And in appreciation, we have a one hundred dollar rebate voucher for you, redeemable at popular stores like: Walmart, Best Buy, Home Depot and many more. Press 1 now to call into the Rewards Department to receive your one hundred dollar rebate voucher or press 2 if you would like to be placed on the Do Not Call list." Evidently, the call was from a robocaller so I filed a complaint today. I also don't give my number to anyone except immediate family members so that B.S. about visiting one of their affiliate websites is just that: bullsh*t! Tell me lies, tell me sweet, little lies! I smell B.S.!!!

Yeah, same deal: two rings on my cell phone and they hung up. What benefit do they get out of not completing the call?

SCAM/SCUM

Two rings and no caller ID I did not answer fast enough. Seems suspicious to me.