Well fighting piracy DOES work to some degree. If you can make it slightly harder it will eliminate more piracy. For example I don't pirate now, because I know my ISP tracks it using DPI of traffic. Some people take the next step of getting a VPN, but I didn't. My main point is it beneficial for you to minimize your expenditures. I don't feel guilty about it either. Apple/Microsoft/etc all minimize their tax bills. It is just good business.