Yeah it’s just BS guessing. They will be “authoritative” with their calculations until someone calls them out on it then it will all be “an educated guess”. I don’t even have the totals in one xpub. All from multiple sources. …maybe they do have monthly chats with the exchanges!

https://nostr.build/i/nostr.build_9534227a0e0e3006fc486bf465b2f3d54123da2201466562bf9f4ba423f84d9b.gif