It's probably also helpful that most PC games that were ported from console support DirectInput/XInput. Getting the PC users set up with controllers will make it easier to pitch developers on porting from console VR (Sony) -> PC VR.
It seems like you can't take that out of the bundle if you have one yourself, possibly a modified version? Otherwise that seems like a major disappointment for those already own an xbox controller, and force them to pay additional $$.
Palmer said that they get the controllers for next to nothing (remember the deal they made with Microsoft?). If you don't want it you can sell it and come out ahead of where you would be if they had never included it.