A pirated copy does not mean a lost sale. There are so many factors that go into piracy that its not even funny, ESPECIALLY with Ubisoft games.
First off, the DRM. I know PLENTY of people who bought UbiSoft games, to turn around and pirate them so they could install them on different machines or play the offline. The pirated copies are just better. You STILL got your money though.
Second off - Regions. There are plenty of regions that can play games, but the games aren't priced reasonably. Austrailia, I'm looking at you. But plenty of Asian and South American countries either don't get the games, or get them at a hyper inflated value. Thats YOUR fault UbiSoft.
Third - have you ever stopped to consider that some people pirate games to test them out before buying the actual copy if no demo is available? This is the most slippery of arguments, as you can Scumbag Steve this easily, in multiple ways. But I know plenty of people who keep to their standards and either buy the game or trash it.
If these numbers were true UbiSoft, you'd stop making PC games. There is NO way you could justify having a PC branch if you were at a 19:1 loss ratio when it came to piracy - to yourself, your development team, or your investors. If this was true, you'd shift all your resources over to consoles - the PS3 to be more precise, as piracy on the 360 is pretty damn rampant (although with the drawback of no Xbox Live, hence why people never bring the issue up).
This is either a lie, hyper inflated, or simply misunderstood. Piracy is not a lost sale - especially when you consider the DRM of these games. UbiSoft is the only company I can think of that people will actually purchase a game, then pirate it to make it better. If you fixed your business model, or took more indepth statistics than "Lets check how many people downloaded this off of [insert piracy website here]", I figure you'd have more people backing you.