XBox Gift Card and XBox One Gift Card Difference

Was it gift cards because thats the rewards I'm still waiting for

Different winner here. There were three prizes for me: game pass subscription, gift card, and Xbox gift card.

I've received the first two things. Still waiting on the Xbox gift card.

www.cdkeys.com/.../microsoft-gift-card-50-gbp-xbox-one-360

This page covers most of those details. Check the FAQ at the bottom.

The important parts would be

"Do gift cards expire?

No, gift cards purchased at retail never expire. Note that promotional gift cards like those from Microsoft Rewards or Xbox Live Rewards do expire."

"What is the difference between a Microsoft Gift Card and an Xbox Gift Card?

The cards work just the same. Once redeemed to your Microsoft account, you can spend your balance at Microsoft Store online, on Windows, and on Xbox."

"Where can I spend a gift card?

Once redeemed to your Microsoft account, your gift card balance is available to spend when you shop at Microsoft Store online, on Windows, and on Xbox. Gift cards do not currently work at physical Microsoft Stores."

Should cover you. One thing I'm not certain with is if "gift cards" can be used to pre-order physical goods. Might want to check with Microsoft Store support on that?

I don't think then can do that because the store is different. I know, you can buy X360 games on Xbox One but only with credit card, not with gift cards, at least on Brazil, and Rewards only give to you gift card.

There is not a way to split payment between two credit cards. what you can do is purchase a xbox gift card with one of the credit cards put that xbox gift card onto the account then you would be able to split the payment between the gift card balance choose
this first as the first option that you want to use to pay then it will ask you how you want to pay the difference and then you can use the other credit card.