Traditionally, "platforms" are centralized, controlled by one entity, while "protocols" are decentralized sets of rules for communication. However, today's "decentralized platforms" or dApps blend both. They provide services like platforms but operate like protocols, with open-source code [0] [1], decentralized governance [2] and transparency.

But, i do agree with centralization with respect with hosted webapp at gitopia.com. However, since webapp is open-source, anyone is free to host their version. And, also we have plans to release a desktop app which removes the reliance on a website altogether.

[0] https://gitopia.com/gitopia/gitopia

[1] https://gitopia.com/gitopia/gitopia-web

[2] https://gitopia.com/gitopia?tab=proposals