docs(ins): update wording

Author: bene2k1

pages/instances/faq.mdx

@@ -52,13 +52,17 @@ You can change the storage type and flexible IP after the Instance creation, whi
 
 ## How are Instances billed?
 
-Instances are billed according to how long they remain powered on:
+Instances are billed based on their runtime while powered on:
+- **CPU Instances**: Billed per hour of uptime (including startup and standby time).
+- **GPU Instances**: Billed per minute of uptime (including startup and standby time), except for RENDER-S GPU Instances, which are billed per hour.
 
-- **CPU Instances**: Charged per hour while powered on or in standby.
-- **GPU Instances**: Charged per minute while powered on or in standby (except for RENDER-S GPU Instances which are billed per hour).
+<Message type="note">
+  For Kapsule and Kubernetes users: the underlying Instance in a GPU node pool is billed as soon as it is created—even during the setup phase, before the NVIDIA GPU Operator is fully initialized.
+</Message>
+
+Keep in mind that while compute resources follow this usage-based billing model, other resources—such as public IP addresses and storage volumes—are billed for their entire allocation period, regardless of whether the instance is powered off.
 
-Note, that while compute resources follow this usage-based model, other resources - such as IP addresses and storage — are billed for the entire duration they remain allocated to your account, even if the Instance is powered off.
-For more information about Instance billing, refer to the [Instances pricing page](https://www.scaleway.com/en/pricing/virtual-instances/)
+For more details, visit the [Instances pricing page](https://www.scaleway.com/en/pricing/virtual-instances/).
 
 ### What are the prices for Instances?