I was 1K and flew ZERO revenue flights in 2013. Via the iPad application, it shows me as 1K through 2015 (definitely took a screenshot) but I did not receive any GPUs.
If true, that is awful nice of them. If not, oh well.
Used to be clear that status went to end of February, then January. Rules now say it is for the Calendar year.. So to have the extra month or so seems like an opportunity to reduce costs so I am surprised United haven't done it yet.