Neener: My guess is that the show was opened for ratings because the first episode premieres February 2, and in the Eastern Hemisphere it's been February 2 for some hours now.
This is correct, thanks. It would have been open votes from midnight today anyway, however, in this case there's actually an earlier release date -> http://www.imdb.com/title/tt2261227/releaseinfo so voting has been open since then.
Col Needham, Official Rep
[https://help.imdb.com/article/imdb/track-movies-tv/faq-for-imdb-ratings/G67Y87TFYYP6TWAV]