Apple seems to get it: that piracy leads to market share. Getting out buzz about the product is the main thing.
So how about that for a business model?
AppleInsider | Apple drops anti-piracy measures from iWork '09:
"Piracy has also historically contributed to the popularity and market share of many apps by allowing users who are unlikely to ever pay for anything to use the software, resulting in wide adoption and subsequent sales from businesses, institutional buyers, and others who do pay for the software they use."