docs: add Referrals section to Credit pricing page

credits.mdx

@@ -14,7 +14,7 @@
 
 ## Plan availability
 
 Credits are available on the **Pro plan and above**. Every Pro plan includes 10,000 credits per month, and you can purchase additional credits from the [Usage](https://app.mintlify.com/settings/organization/usage) page whenever you need more.
 
 The free Starter plan does not include AI features. You cannot purchase credits on the starter plan. To use the assistant, agent, or automations, upgrade to Pro or Enterprise.
 
@@ -94,3 +94,9 @@
 **Schedule automations instead of triggering on every push.** Automations like SEO audits, writing style checks, and broken link detection don't need to run on every code change. Running these on a daily or weekly cron schedule rather than on every push significantly reduces credit consumption without meaningful impact on content quality.
 
 **Monitor your usage patterns.** The [Usage](https://app.mintlify.com/settings/organization/usage) page in your dashboard shows a breakdown by feature category. If a particular automation is consuming more credits than expected, review its trigger or any custom instructions.
+
+## Referrals
+
+Navigate to **Referrals** in Settings to refer other teams to Mintlify by email invite or by sharing a link. When a team you referred signs up for a Pro plan, you both receive $500 worth of credits, priced at $0.01 per credit, for a total of 50,000 credits each.
+
+You can invite as many teams as you'd like, but referral rewards are capped at three successful invites, for a maximum of $1,500 in credits, or 150,000 credits.