After nostr:npub1qny3tkh0acurzla8x3zy4nhrjz5zd8l9sy9jys09umwng00manysew95gx & nostr:npub16c0nh3dnadzqpm76uctf5hqhe2lny344zsmpm6feee9p5rdxaa9q586nvr discussion CD106, the following article mentions half of Twitter users are ‘lurkers’:

https://www.digitalinformationworld.com/2022/03/half-of-twitter-users-are-lurkers-heres.html?m=1

Doubling the trusted active users on https://stats.nostr.band should give a more realistic estimate, assuming proportion of lurkers is the same as the bird app.

https://www.podpage.com/citadeldispatch/cd106-nostr-is-freedom-with-miljan-of-primal/