I received my Xbox One on launch day on November 22, 2013. I didn't have gold at the time but I set up my account and was able to use some of its features. My friend also set up his account on my console (he didn't have a Xbox One) just to see what Netflix was like and to change his gamerpic.
I was able to access Gold features (such as playing Online) because his Xbox gamertag was Gold. I was able to log in everyday and play online everyday up until TODAY, December 25, 2013.
He still has Gold membership so I don't understand. I hear Xbox Live servers may be having some problems. I don't mind paying for a Xbox Live subscription but I want to clear things up as to why things aren't working with my account.
If anyone has any information on this that would be great, thanks.