Crops may be a very small part of it but certainly not all.. Communities (volunteers) rally around the club and a sat night in a country town is always busy for club home games - netballers etc too they are really more of a community hub than just a football club - fundraisers raffles etc well run and well supported I think you'd find city clubs with this sort of backing would thrive too.. Then gate takings etc add up too it's a lot of little things certainly not just a farmer or 5 handing over cash - not uncommon for clubs to do 120 meals post game!