Hello snackingcomet
Welcome to Microsoft Community.
It is right to be wary of any process that doesn't make sense.
However, I checked the two links you shared here and they are both from Microsoft and both are true and valid.
But I'm not sure where Microsoft Support you contacted and why they provided you with this refund process. Allow me to provide you with real-time support steps on how to contact the Microsoft Accessories Support team here so you can confirm with them the authenticity of this process:
- Use your personal Microsoft account (not your organization account) to access the following links:
- Type Microsoft Sculpt keyboard, press Enter, and click "Contact Support" at the bottom:
- Select Technical Support and select the device model you are currently using in Produce family, then click Confirm:
- You will see contact options for Chat support and Phone support, please contact them during business hours:
It is recommended that you contact Chat Support so you can easily provide them with links and screenshots.
I wish you all the best.
Best Regards,
Mitchell | Microsoft Community Support Specialist