By that logic they also promote the iPad, iPhone, Android, PHP, MySql, Apache and Linux.
Look, XNA is dead when (and only when) there is a press release from Redmond stating that is the case. Until then, what tech websites, randomers on the Internet and you, in your own twisted mind believe to be true is simply baloney.
Microsoft has not announced that XNA is discontinued, ergo XNA is not dead. End of.