https://help.steampowered.com/en/faqs/view/0AC8-A264-CC02-14F0

If selected, you will be notified via email using the email address associated with your qualifying Steam account on or about September 17, 2026 that you have been added to the reservation queue. As units become available, people in the reservation queue will receive an email with the option to purchase. We’ll send the first batch of those starting Friday, September 18, 2026. Those emails will include a link for purchasing the Product (“Link”). The Link will expire 72 hours after it is sent by Valve. If you do not buy the Product by the expiration date, your opportunity will also expire. If you are not selected, you will receive an email letting you know that you’ve been added to the waitlist and we’ll let you know when more units become available.