Without intention to sound like a jerk, but I disagree with the sentiment and it’s not technically a privilege, by definition (with perhaps exception for those who literally couldn’t pay for the price difference).
Preorder bonus and early adopters don’t necessarily need to mean the same thing. Often the case, and has been seen with MMOs, those who buy and support early receive some acknowledgement.
It’s irritating to have such a step hit in price just a few weeks into it. Anything to say ‘thanks’ to those who’ve been a part of the early (paid) experience, especially while it’s been shaking out bugs and stuff.