Not sure why people downvote you, but most must be. Because I checked the player count this morning in Europe and it was also at 1,5 million. The only ones that play games in early hours of Europe are a majority in Asia, more specifically China. This has also been my experience with online matchmaking in early hours of the day, it’s 9 out of 10 chance I got matched with either Chinese or Koreans during those hours.
I knew of this game but had already forgotten about it. Just got notified recently because the benchmark was downloaded a lot past week.