...and, if I may add, one of the true strengths of the PDF side of the industry. The "three-month window/life cycle" thing just isn't a factor at all.
Adamant Entertainment still has steady sales of product that we released back in 2003, for example. Sure, there's a "new shiny toy" spike during the first couple of months, but unlike the print business, where sales plummet and often disappear entirely after that, the PDFs settle into a steady sales pattern, that, at least as far as we've seen so far, is perpetual.