marketplace theft的话，大概率是黑卡或者非法共享账号什么的

Marketplace theft includes, but isn’t limited to:

Getting, asking for, or using redemption codes illegitimately
Transferring licenses to your console from an account that you didn’t create
Using a system glitch or loophole for financial gain
Using any sort of “shared” account to avoid having to pay for games or content
Successfully redeeming or giving away a code and contacting customer support claiming the code didn’t work
Attempting to defraud Microsoft or authorized agents
Fraudulently transferring content licenses
Sharing account credentials
Asking to be added to someone’s third party subscription (such as Netflix, Hulu, etc.), in order to avoid restrictions or payment
适用楼主的是这个部分，邮件里明确也说出了marketplace theft