My understanding was that previously it was a weighted composite of the personal fame of the members (weighted so the higher ranks have more effect than the plain vanilla members).
Has this changed? If so, how? Is guild fame purely generated through missions done/fame earned while a member of the guild?
Anyway, however it is calculated, a bit of clarification would be most welcome.
(Sorry if this has been psoted somewhere else and I missed it, but even if it did, it needs a bump so everyone knows
