Hello Vercel Community.
This week I launched a shadcn registry template called Zeta.

I'm working with different partners, in this initial version, I choose Polar.sh as the License Key provider. Your component are protected and only can be accessible if the user authenticates with their License Key.
I'm working on a dedicated docs page. I'm in conversations with Better Auth, and hopefully Vercel team can also give some assistance, especially for those who want to deploy the registry into their Vercel account.
This is it by the meantime, but definitely, the future of Zeta and shadcn registries in general is promising.
Let me know your thoughts!
https://zeta-registry.vercel.app
Ronny