I found this part interesting....
I never minded piracy. Anyone who minds about piracy is full of s#$%. Anyone who pirates your game wasn’t going to buy it anyway!
...from the guys writting the games.
Over-simplified if you ask me. The same goes for the other direction (every pirate is a potential buyer). The truth is somewhere inbetween.
There is always a barrier where you consider buying a game or not. The proof is "Gold" or "GOTY" editions that are sold for around €10 to €30 where you suddenly consider a game that you didn't buy before.
Some people are just not ready to pay €50 for a game and therefore pirate it if they get the chance. They might buy it when the price goes down. For example, I considered buying "Medal of Honor" when it came out but the price was simply too high for my taste. When they re-released it with all addons for the same price even I bought it.
Lately I almost exclusively buy GOTY or Gold editions.