If I recall there was an article on this website about a production run of 1.5 million BlackBerry PlayBooks. There was much debate about the production run volume on this forum as well.
The wireless carriers pay a small portion of the BIS and BES data plan fee collected from their subscribers and remit payment to Research In Motion. I doubt the fee paid to RIM exceeds USD5.00/CAD5.00 per month per subscriber for the BIS and BES subscribers. The fee submitted for the BlackBerry Social Plans are certainly less than USD5.00/CAD5.00.