[wcdolphin]

Very creative, extremely complex, what a fun hack. TL;DR exploit the fact that AWS keeps your lambda process running (and in memory) beyond the time you are billed for in order to build an ephemeral cache. Creates one lambda per slice of cache (think redis slots) and provides a proxy to hide the (substantial) complexity from clients, keeping those lambdas warm, etc. I could see this being useful for cost hacking if the request volume was on the order of one request per key every few minutes.