I signed up because I was curious, I'm still a mod, and they promised swag. (My subreddit voted against moving over to lemmy and it's fine, I guess. They're the only reason I'm still over there at all.)
It was interesting--I've not watched all of it, but it was very high energy.
My biggest takeaway was that OMG they don't care about hearing-impaired mods. The subtitles were auto-generated and, even a few hours later, still had very obvious errors. For example, "a mod" was consistently transcribed as "Ahmad". "I love r/stupiddovenests and r/gardening" became "I love our stupid dove nests and our gardening". Very distracting.
Anyways, after the event you get to pick your swag--either a plushie or 'digital swag'. I'm going with the snoo plushie because it looks about the right size for my dog to hump, and he likes to take out his aggression against white plushies (the color of my other dog, who passed away a few years ago. He still growls at videos of her because he's a butthead).