Correct although it had a really good decentralized plan laid out. Kinda feel this is a technicality  

 Having a small number of total participants is different from centralization. I see centralization more as asymmetric control. 

 Lack of incentives to run a node in the case of nostr sadly. We need a token 😆
But seriously as long as we can't find a way to integrate Bitcoin incentives for nostr relays it will centralized overtime. 

 Tokens are centralized. 

 That was a joke…