I am one of the admins on a hunting forum with 5000ish members, the grumps tend to be cyclical, and we notice a definite increase in the cranky posts and squabbles over the summer months particularly........it just happens, doesnt mean the forum is going badly, and tends to ease off again.
We run commercial advertising from a number of wholsesalers and retailers, and each one gets their own sub forum for Q&A, quotes etc......it well and truly covers our running costs, and gives us capacity to run our own events, and sponsor prizes etc from the forums funds.
Great forum BTW, I am getting alot out of being here