rich1.0npub1t4df6nekwwjwrzf7g90vkrch3hcwl26jyurqru8ndkwtv3lv98js6qsdf4https://nostr.ae/npub1t4df6nekwwjwrzf7g90vkrch3hcwl26jyurqru8ndkwtv3lv98js6qsdf4njumphttps://nostr.aeHow are they able to track the number of non-listening nodes since they do not broadcast their node?