Its back but now you get a $25 Amazon GC instead off a $15 GC.
Amazon Prime is fully refundable as long as you do NOT use any features of Amazon Prime.
For the purpose of this promotion, i would recommend you create a new account & sign up to a paid Prime memebership via Topcashback link. Then sign out and wait for your $25 Gift Card. Then chat with amazon and cancel Prime and get your refund.
Enjoy
Is it only for the new Prime subscribers? Asking because I have had Prime membership before that I got cancelled a couple of months ago.