Congrats to CD Projekt for this well earned milestone!
From the article:
“We tried to treat people well, and they’ve treated us well,” said Kacinski, revealing CD Projekt’s shocking, forward-thinking strategy. Gamers have repaid CD Projekt by spreading the word of the game and encouraging others to buy the original copy; pirating would mean being disloyal to a company that has shown gamers nothing but loyalty. An emotional connection with a company and a product is therefore established.
Duh. 
Treat your customers respectfully and they will in turn do their best to let all of their friends know.
At the end of the article is this treat:
As for the future of The Witcher, CD Projekt “wouldn’t be very smart,” according to Kicinski, if it didn’t revisit the universe. An announcement is possible in the near future. “We for sure will stay in this world [of The Witcher]. We’ve grown very comfortable with it. We still have a lot of cool ideas that didn’t make it into the first Witcher, so there will definitely be something more from The Witcher world.”
Last but not least, check out The Witcher 1st Anniversary Movie
