"Loyalty Bonus Award?"

So I just loaded up Halo: Reach when I got a message rewarding me with 2000cR for “being such a big fan.” I’ve never heard of this reward before despite the fact that I’ve been playing Halo: Reach (offline and, much later, online) since release.

I think I had a message like that once I first booted up Reach despite not even owning another halo at that time. Even weirder when I opened it for the first time on the xbone, it said that I was something like 20000 credits over balance(I hadn’t even earned that much at that point) and that it had to adjust my funds accordingly, but just ended up deleting my left pauldrin. Weird.