Use Xbox One Credit?

Have today bought 10 euro balance and have redeemed, in my Microsoft account this is also displayed. But if I want to buy SSX3, can I just pay by Paypal? And also in general with other purchases only Paypal appears to me…

Is it possible that your game is an Xbox 360 or original Xbox game?

Yes, this is an original Xbox game

Games of the previous two generation (XBox, XBox360) were available only against Kredidkarte and later against Microsoftpoints. The payment option via Paypal was added only with the One. Thus, XBox and XBox360 games still can't be purchased with XBox credit.

Why is a secret that only Microsoft knows.