What counts as a PWA?
Generally, a PWA is a domain + a logo + a name. If a PWA has the same logo and name but is available simultaneously on multiple domains (like how coronavirus.app is also available at crnvr.us), it only counts as "one PWA". A PWA can have up to 50,000 push subscribers (i.e. users who have allowed push notifications). A PWA with more than 50,000 subscribers count as multiple PWAs. For example, a PWA with 300,000 push subscribers counts as 6 PWAs.