Anyway to see number of zaps or total value transferred?
Nostr is exploding with growth. The total amount of pubkeys writing events has passed 2 million. We're fast approaching 20 million total events published.
https://void.cat/d/AoniwoWd79pqbwQx4JdmNc.webp
https://void.cat/d/HaHsnHhwhqbEKbzz545ogd.webp
You can view all of the statistics yourself here: https://nostr.band/stats.html#total_users
Discussion
it does include the total number of zaps. though that number seems low at 3200+. maybe it's correct.
Yesterday's #zapping ⚡ entirely attributed to #[4]
Lol! #[3] is a fellow stackchainer and has experienced first hand how us stackchainers go wild when stacking and zapping! 😂😂😂 (I zapped like crazy yesterday!) 
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