#3 should read exactly as it does today: "How many users/unique visitors does your main site have per MONTH? " Keep in mind that unique visitors are measured daily. So if you have 200,000 employees, its possible to have 150,000 or more unique visitors per day - multiplied by 30 days.... and now you see how the unique visitors for the month could be very high. I have a client that has, in fact, 350,000 employees... GM, WalMart, McDonalds, IBM, these are all companies that also participated in the survey and have many more employees than that.