The nostr:npub14f26g7dddy6dpltc70da3pg4e5w2p4apzzqjuugnsr2ema6e3y6s2xv7lu is the biggest existing Bitcoin Circular Economy.

The best example of a real Bitcoin Community Bank acting as a Bitcoin Service Provider

Running open source with the Blink stack, nostr:npub155m2k8ml8sqn8w4dhh689vdv0t2twa8dgvkpnzfggxf4wfughjsq2cdcvg, Bitcoinize machines, Bolt Cards and on/off ramps with Bull Bitcoin

https://blog.btcpayserver.org/case-study-bitcoin-jungle-cr/