Obviously, you need to be a Best Buy Credit Card holder for this deal. Got this in my e-mail yesterday. Offer needs to be activated on the card. Spend $250 in a single transaction between April 1 and April 10 online or in-store and receive a $25 e-Gift card, which will be sent 5-6 weeks after the end of the promotion.
Title of the e-mail is: "NAME, Cardmember Appreciation starts now! Here’s your first offer: Earn a $25 Best Buy® e-Gift Card." Received 11:51 AM EST on April 1.
The terms do not seem to imply limitations on gift cards:
This offer is only for the intended recipient of this email. Activate offer and use your My Best Buy® Credit Card to spend $250 or more in a single purchase at select stores or on BestBuy.com® by 4/10/21, and get a $25 e-Gift Card. The e-Gift Card will be sent 5-6 weeks after the promotion ends. Offer is non-transferable. Subject to credit approval. My Best Buy Credit Card account must be open and in good standing. Limit 1 e-Gift Card per account. No cash value. May not be combined with other offers. Does not include tax. Additional limitations may apply. Subject to Gift Card Terms and Conditions. In select stores. Online offer may vary. Subject to change without notice.
QA Note: YMMV – Select Accounts