How would you grow a newsletter from 1k to 10k subscribers?

I would write a newsletter about how to grow a newsletter from 1k to 10k subscribers.

In all seriousness, write about something 10k people would want to read and then go hang out where your audience hangs out. It's hard to give more detail without knowing more about your circumstances.

What ideas have you already considered?

Creating a 9k bots seems not so hard.