That's true - they've never turned anyone away. My only worry is at some point they can only have so many cars. So much time allocated at each track. Last year I believe 347 registered.
What happens when over 400 show up? Or more?
It's gotten a lot popular. I am sure they don't want to turn away people who've come with great anticipation. But IMHO at some point/year/registration they will have to say - this is it.