There are something like 1.5 million active players, which has been discussed before.
So 61,000 Forum users would be something like 4% of active players.
But I think it’s important to remember that a LOT of players read the Forum without creating an account or logging in, and many alliances have one or two players who read the Forum and share information with other people.
I also see a lot of people in the E&P Facebook and Line groups sharing screenshots of info from the Forum quite frequently.
So I think the overall readership is probably effectively much higher — but the participation of contributors who actually share information and discussion on the Forum is definitely a very small percentage of players.
…but it’s a higher percentage than the HOTM appearance rate, at least. 