I visited a friend in Phnom Penh a couple of years ago. They have lots of "DVD shops" in any of their shopping areas. 100% of the DVDs are pirated. If you want a non-pirated DVD, you have to find an airport. I think there's also one high class mall that contains one dvd store with non-pirated DVDs and software.
Cambodia has no taxes. The money the government runs on is half bribes and half foreign aid. To bring in more foreign aid, they know they have to stop piracy, but that's their only incentive. When foreign ambassadors come to visit, they'll send out a signal to all the DVD shops, and they'll all close down. 3 days later, they all come back.