According to similarweb, the traffic on the freebitcoin site for the last month was more than 26 million. For example, the popular exchange bybit has about the same traffic. This is really impressive, but I honestly have doubts about the reliability of this data. Personally, I think that the problems that have been occurring with the freebitcoin site over the past year should have triggered an exodus of most of their audience.
I'm surprised too, but that data must be collected automatically, right? Even taking into account an acceptable margin of error of 10 or 15% they are still very high numbers. Although if it is true one is not surprised that they keep running the site like that. If they are running it so badly and still have so many customers, and making so much money, there doesn't seem to be an incentive to improve.