Update pricing.mdx (#23933)

better intro/explanation of two methods

Author: kathayl

src/content/docs/browser-rendering/platform/pricing.mdx

@@ -5,7 +5,11 @@ sidebar:
   order: 31
 ---
 
-Browser Rendering is currently available at no cost up to the [limits](/browser-rendering/platform/limits/) specified, with billing beginning on August 20, 2025 at the following rates:
+Browser Rendering is currently available at no cost up to the [limits](/browser-rendering/platform/limits/) specified, with billing beginning on August 20, 2025.
+
+There are two ways to use Browser Rendering. Depending on the method you use, here’s how billing will work:
+- [**REST API**](/browser-rendering/rest-api/): Charged for **Duration** only ($/browser hour)
+- [**Workers Bindings**](/browser-rendering/workers-bindings/): Charged for both **Duration** and **Concurrency** ($/browser hour and # of concurrent browsers)
 
 | Plan           | Included duration                                                                 | Included concurrency                                                 | Price (beyond included) |
 |----------------|---------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------|----------|
@@ -37,4 +41,4 @@ For **concurrent browsers**:
 <br/>5 browsers × $2.00 per browser = $10.00
 
 For **browser duration** and **concurrent browsers**:
-<br/>$3.60 + $10.00 = $13.60
+<br/>$3.60 + $10.00 = $13.60