Adding note on detection, adding note on PPC beta (cloudflare#23386)

Author: Oxyjun

src/content/docs/ai-audit/features/manage-ai-crawlers.mdx

@@ -41,11 +41,25 @@ The **AI Crawlers** tab displays a table of AI crawlers that are requesting acce
 </TabItem>
 </Tabs>
 
+:::note[Quality of AI crawler detection]
+On the free plan, AI Audit identifies AI crawlers based on their [user agent strings](https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/User-Agent). This enables AI Audit to detect easy-to-detect (well-known) AI crawlers.
+
+Upgrade your plan to enable a more thorough detection using Cloudflare's [Bot Management detection ID](/bots/reference/bot-management-variables/#ruleset-engine-fields) field.
+:::
+
 ## Take action for each AI crawler
 
 <Tabs>
 <TabItem label="With pay per crawl">
 
+:::note[Pay per crawl closed beta]
+Pay per crawl is currently in closed beta.
+
+To find out how to join the beta program, reach out to us at [Pay per crawl signup](http://www.cloudflare.com/paypercrawl-signup/), or contact your account executive if you are an existing Enterprise customer.
+
+To learn more about pay per crawl, refer to Cloudflare blog: [Introducing pay per crawl: enabling content owners to charge AI crawlers for access](https://blog.cloudflare.com/introducing-pay-per-crawl/).
+:::
+
 For each AI crawler, you can take one of three actions: allow, charge, or block.
 
 <Example title="Allow access">