docs: add link to official PPE documentation

Author: patrikbraborec

docs/guides/pay_per_event.mdx

@@ -13,6 +13,12 @@ Apify provides several [pricing models](https://docs.apify.com/platform/actors/p
 
 To use the pay-per-event pricing model, you first need to [set it up](https://docs.apify.com/platform/actors/running/actors-in-store#pay-per-event) for your Actor in the Apify console. After that, you're free to start charging for events.
 
+:::info How pay-per-event pricing works
+
+If you want more details about PPE pricing, please refer to our [PPE documentation](/platform/actors/publishing/monetize/pay-per-event).
+
+:::
+
 ## Charging for events
 
 After monetization is set in the Apify console, you can add <ApiLink to="class/Actor#charge">`Actor.charge`</ApiLink> calls to your code and start monetizing!