I don't think I had ordered much of anything online. Even now I don't order a ton on there, maybe 4-5 things a year. If I wasn't married to her, I am not sure I would have an account and for sure not pay for prime.
My wife and kids on the other hand, we get amazon at least 4-5 times a week, and certain times of the year multiple times a day. I know some in my family that don't have an account.