The current policy on beta sites is:
- When a site starts to consistently receive 10 questions/day, we’ll consider it for graduation.
- If a public beta site does not produce consistently helpful content, and lacks the caretakers needed for flags and spam to get handled and our Be Nice policy to be upheld, it will be closed.
Is your site in between these two categories? You don’t have anything to worry about. Regardless of how small the site might be, you have a home here in the SE network. Spoiler alert: As of this post, no site which is currently active is at risk of being shut down.
Even though I'd certainly welcome more questions, I think it's safe to say that there's no reason for concern. We do consistently (albeit a bit slowly) produce helpful content, and the moderation workload is minimal1. There's certainly room for improvement in all aspects of the site, but, no, we aren't in danger of getting closed.
1 Our average flag handling time this quarter is ~12 hours. This doesn't accurately reflect the workload, though, as very few of our flags require quick responses (as do - for example - spam/abusive flags).