It's not the first time I see this kind of 'non-refundable, prepaid in full' rate types. However if you read further some said, 'non-refundable, prepaid in full, if cancelled within 1 day(s)'.

I always follow the exact rate rules and I'm not worried about it because the rate rule will be in my reservation. If there is a dispute I can pull my reservation and tell them that I could cancel my ressie within 24 hours.