This is it! There's even a countdown clock on the website. Enter your codes now or forever hold your peace (I think.). The only thing we know about the new program is what they say on their website, which is "Soon, getting rewarded will be easier and more convenient than ever before."
That doesn't give us much in the way of details, other than to tell us that it will be more difficult to get rewards and more of a PITA to do so.