Except you're overlooking something. There may only be 60 players, but you forget that the past realms had the two character rule, meaning you could have 100 characters in the realm, but have less overall players than GX had at the 60 player mark. So basically multiply the current number by 2/3 and add it to the current total to see about what it would look like when Battlemaster was at its peak. GX would easily be near or over the 100 character mark. Plus I believe you're overstating greatly how many realms were over 100 characters. That may have been the case for realms such as Sirion, Perdan, and Cagilan Empire, but there are realms besides those that I doubt had so many people.
Abington had at least 90 players. They once had 183 characters. I doubt everyone had 2 characters there either so probably had at least 120~130 players.
