vanilla peaked at 7
tbc peaked at 8
wotlk peaked at 10
cata peaked at 12
mop peaked at 8
wod peaked at 10
Legion peaked at ?? (they stopped releasing this data)
this was because WOD dropped to 5million after 1-2months and continued dropping making bad headlines so they no longer release this data.
the real question is how far did WOD drop and is this drop normal for ALL of the expansions? could it have dropped as low as 3 or 2 million subs? it sure seemed that way how fast it was dropping.
what does this mean for Classic? what happens if in-between expansions the most played version of wow is the classic version and then on expansions people play them for 2-3months and then quit? could this make blizzard make different kinds of expansions in the future that cater to the classic gameplay style that lasts years not months?
i wonder if classic is a experiment to see if it really does retain more players than their current "approach"