The PC gaming market is almost entirely multiplayer games, console ports, republished older releases, flash games, and independent games sold through Steam. Alm

The PC gaming market is almost entirely multiplayer games, console ports, republished older releases, flash games, and independent games sold through Steam. Almost no one is investing significant budgets in easily pirated, single-player PC games. I'm not saying the PC gaming market is unhealthy or dying, but you should realize that every decision PC game developers make is driven by the need to make money in spite of rampant piracy. The OP asked for evidence that piracy has an effect on business decisions - it definitely does for PC games. In fact, I think it's probably the most important factor.