$100.00 Xbox Gift Card Instant Delivery (Can be used in Microsoft Store also)

Can be use for both Xbox account, as well as Microsoft store once you redeem the gift card in your Microsoft / Xbox account.

https://support.xbox.com/en-US/help/subscriptions-billing/redeem-codes-gifting/redeem-prepaid-codes

https://support.microsoft.com/en-us/account-billing/redeem-a-gift-card-or-code-to-your-microsoft-account-d6b2c675-9e31-f312-7ff4-21834ad22fa8

The easiest way to redeem a gift card or code is online. Sign in to redeem.microsoft.com with your Microsoft account, enter the 25-character code, and then select Next.