What's this about some preorder people getting a 911 GT3? Was it a Xbox Live message like the Senna and 720S?

I saw a post talking about preorder people getting a free car, but another commenter saying that not everyone was credited it. How do I get it? Why are some preorders receiving cars and others not?

Submitted by triplec787 | #Specialdealer Special Offer Online Shopping Store 2016