Money is not a moat since you can buy money (debt) or sell equity for money.

>The thing I launched last week is called Kith — a paid, invite-only social network

Social networks already is an existing competitive space and making it both paid and invite only obviously will hurt its adoption. I wouldn't have been surprised if this failed to get users even if it was free and even if this was preLLM. A brand new social network doesn't truly solve users problems.