Yes, by all means, make this thread about the last thing I posted here and not the content of this message. That'll teach me!
After getting my tax refund, I went on a bit of a DLC buying spree - got $80 worth of songs from the PSN Store, then went to the in-game store for Pro upgrades. I loaded my account with the automatic five dollar minimum to buy the upgrade for "Unbelievable," but then was not charged for the upgrade for "I Alone." I didn't even notice it at first, as I was just mechanically pressing buttons without paying too much attention, but it went straight from the description screen to the download screen. No screen asking me to authorize payment. And in the corner of the description screen, where the price ($0.99) usually is listed, it indeed said "Free."
If this is some promotion I was unaware of, feel free to disregard this message, but I can't imagine that it's supposed to be free.