NOSTR has this page where you can see real-time stats: https://stats.nostr.band/

Pubkeys: 44,960,795
Users: 1,194,619
Trusted users: 194,875
Events: 612,400,654
Posts: 162,944,659
Zaps: 5,492,232

HIVE actually lets users exchange value with no KYC. That's already more that what NOSTR can do.