I never knew this, but I think it makes sense. Is there any documentation that explains why this is the case? I suspect it is to distribute bias to the first option, but I'd love to read about it.

[edit] Nevermind, I just needed the right combination of terms to find it: https://docs.aws.amazon.com/ram/latest/userguide/working-wit...

Woah, thanks for clarifying--I had no idea!