What is the nostr equivalent of creators collecting phone numbers and emails…?

Let me explain:

On apps like Instagram/TikTok/YouTube, many creators will attempt to take their audience off platform and eventually capture some info like name, email, phone number.

This allows creators to:

1. Own their audience (reducing platform risk)

2. Have closer communication channels with their audience

With nostr, it’s apparent to me that Number 1 is solved for…

But what about number 2.

What exists for this today?

Some form of community, more direct communication, super-follow, etc.

Does something like this exist? Is there even a need for this here?

🤔🤔🤔🤔