Nsec bunker is paid?
Discussion
nostr:npub1l2vyh47mk2p0qlsku7hg0vn29faehy9hy34ygaclpn66ukqp3afqutajft can correct but I believe...
1. nsecbunker is FOSS – https://github.com/kind-0/nsecbunkerd Looks like the license is non-commercial though.
2. there is a hosted version which is the paid version that nostr:npub1l2vyh47mk2p0qlsku7hg0vn29faehy9hy34ygaclpn66ukqp3afqutajft runs.
3. Yes, if the one paid version gets too big, it'll be a centralizing force.