Thanks for posting your questions. Here are some answers.
"Can the promo/reward certificate(s) be used if it expires before the game release date?"
Yes, My Best Buy certificates and promotional certificates can be used on pre-orders.
"How do they impact the rewarded points?"
Any portion of the purchase paid for using a My Best Buy certificate, promotional certificate, or Best Buy Gift Card will not qualify for points. Purchases made using promotional financing with the My Best Buy Credit Card do not qualify for points. Sales tax amounts are also ineligible for points.
"If preorder is cancelled, do the certificates get reissued / points refunded
If promo vs reward certificates differ, please specify."
If a pre-order is cancelled, any portion of the purchase paid for using My Best Buy certificates will be refunded to the My Best Buy account. Promotional certificates do NOT qualify for refunds. Titles that qualify for the Get $10 in Rewards offer will only receive the offer if the order is fulfilled.
Please don't hesitate to reach back out if you have any other questions.
Fey|Social Media Specialist | Best Buy® Corporate Give Kudos if you like this post or Accept as Solution if it answers your query!