You are right that these statistics do not tell you much about the number of users, as they only show the effectiveness of marketing campaigns. However, we can conclude that the popularity of 1xbit is increasing and that does not surprise me at all.
That means the only thing that matters to you is increasing the traffic! The amount of unresolved reports that are coming out, and the number of reports that would have come out a few days later, should also be kept in mind. So say 1xbit to resolve unresolved reports, then at least 1xbit does not have to run its own activities with such a low reputation.