Raise the free credit to $10+ USD
I just got $5 free credit from my email, and thought "Wow Oculus, thanks!" Now It's sitting in my store credit, because guess what? Nothing is below $5. Seriously, Oculus, why? It's especially useless since it expires, which I think should also stretch to twice the amount of time.
Maybe instead you should be happy that you actually got $5 store credit instead of none.