The website pretends to be "flight stats" but it also has separate website - cirium. I work with statistics and economic research and subscribed for standard subscription. No useful information was found apart from current flights timetable, which I did not need at all. In advertisement of the subscription they had departures and arrivals but did not mention that it regards only to current flights +/- one day. So, unsubscribed immediately after trying, unfortunately losing small amount.
They pretend to be flightstats, there's no stats, just tracker.