LOL! I think it would not be so much useful as in production, but for education or experiment purpose, it can be a good sample of setting up AWS Lambda, using Rust/Elixir and blockchain, or even for performance benchmarking or comparison.
I was going to say... I’d hate to rely on a web service I don’t own for anything other than playing around.
Would you use it if you could run it in your own cloud with Kubernetes?
Regarding perfomance, it's very fast already, and I have lots of room to scale both horizontally and vertically.