Sorry but I don't buy any of the above - if people are pirating a game, if anything, if they like the game and tell their friends about it, they are more likely than not to offer to show them how and where they got the game for nothing, rather than influencing them to buy it.It's more likely to increase instances of piracy than increase sales.
I don't see how people can measure such a thing either. If people were genuinely demoing a game before buying, then all these illegal download numbers, would lead to increased sales, rather than PC sales continually lagging behind the console equivalents. If someone has a working, pirated copy of a game, I'd say a good 99% of them have no incentive to go out and buy exactly the thing they have been playing for free. Sure, there might be the odd morally sound pirate out there, but the majority will not spend money when they don't need to.
I read elsewhere, that a significant majority of people contacting publisher helplines for games, are having issues running pirate copies. That alone illustrates the entitlement that pirates feel. That doesn't point towards supporting the game financially, but they expect help with a game they have stolen? The mind boggles.
As to CD Projekt - they are hardly as blasé in regard piracy as is made out. Sure, they are actively anti-DRM, but as the following article points out, they are as staunchly anti-piracy.
http://www.eurogamer.net/articles/2010-11-22-witcher-2-torrents-could-net-you-a-fine