@johnefrancis @keithzg @dyckron Yes, I think that too. Although that creates an imbalance between poor/rural ridings and rich/urban ones.
Urban ones are much smaller, so don't take as much effort to get word out and with less space, less signage is needed.
What needs to be controlled is corporate involvement. No need to ban it: just make it that if they gave any money, they cannot access government funding or tax breaks during that cycle.