Some guys feel that there is status in servicing commercial accounts. Or high end fancy neighborhoods. They will drop their price and throw in freebies just for the glory of parking their trucks in front of these "important" customers. Or they take endless crap from these picky customers over quality just for the honor of working in their hood.
The famous "sure I'm losing money on each customer, but I'll make it up on volume!"
Give me a retired couple in a 1970s ranch with no fert or sprinklers, just mow blow and go for $50 per cut. That is where the money is.