Kinda answering this myself.
HTTP 429: Too many requests
What's the limit for this. I wasn't able to find anything via Google, other than a couple of good sandwich recipes.
I'm currently running 3 copies of NS. One real server and 2VMs for testing. However, only one of the instances has IPS active. So why are the rules being downloaded every day for the 2 systems that aren't running an IPS.