They seem to be one-time deployments that never go away. Since there is no updating and no "down" at all, I think the answer to your question is "N/A."
But I may have it wrong. It’s a unique-seeming service, which can make the nuances hard to understand
No. For zero downtime deployments on AWS with blue/green deployments behind EIPs & ELBs, we at Boxfuse (https://boxfuse.com) offer a very easy solution for both Node.js and JVM apps based on immutable infrastructure.
But I may have it wrong. It’s a unique-seeming service, which can make the nuances hard to understand