I will mention here the first 3 client.
What are you waiting for? Reserve your slot now.

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First 3 client slot

1. https://bitcointalk.org/index.php?topic=3062299.msg31540793#msg31540793 Bandz.Network
2. https://bitcointalk.org/index.php?topic=3069079.msg31616401#msg31616401 Amicorum.live
3.