I finally got to the end of the Pandora rainbow yesterday after delightfully chewing up my 40 free hours per month. There wasn’t a pot of gold there but instead a polite request for $0.99 to keep listening for the rest of the month (i.e., today). After entering a few credit-card details I was on my way and the music kept playing.
Thus I’ve spent my first $0.99 on Pandora. More to come, I’m sure!