Cofounder here, happy to answer any questions.
While AWW has been around for some time we've seen a big surge (~6x) in the past two months due to current situation (as did most online/collaborative tools).
While AWW can be used directly on site, we also have an embeddable version, for example some interviewing startups use us as part of their web-based interviewing workflows.
Edit to add: AWW was launched here almost 10 years ago as a hobby project: https://news.ycombinator.com/item?id=2886353 It grew steadily over time and now profitably employs several people and is used by millions of people worldwide.
I don't understand where people get the idea it is a good pattern. It feels like a designer meme, or more like cargo cult, that people add just because everybody else does.