WebSub's biggest advantage from what I can tell is minimizing the load on the publishers. Instead of them having to manage webhooks to send out to, or having hu

WebSub's biggest advantage from what I can tell is minimizing the load on the publishers. Instead of them having to manage webhooks to send out to, or having hundreds of thousands of clients polling them every minute, they can let a Hub do all the work for them. Ably has a pretty good overview: https://ably.com/topic/websub https://ably.com/topic/websub (warning: sales article)