You said you asked them about their "tech stack and ability to scale". A tech stack consists of frameworks and languages used, which can be found on GitHub, so

You said you asked them about their "tech stack and ability to scale". A tech stack consists of frameworks and languages used, which can be found on GitHub, so there's part of your answer. Indeed I'd be interested in the post mortem here and I also don't expect anything from them (depending on how large this turns out to be, though, and so far it's actually a rather huge outage so maybe we'll get some info after all).