Been doing this for 5 years, and our relationship with DISH has been pretty good.
There are only 2 of us, my wife and I. We have no subs or other employees. I had prior experience as a tech. We set up accounts for folks and install them. We do only the DHA24 (24 month agreement.) We have an extremely low account cancel rate (called "churn.") If someone doesn't pass the credit check that is required for the DHA24, we refer them to the 800 number to sign up under another promotion. A poor credit rating can (not always...but can be) an indicator of someone who is a risk...may not pay their bills....handles their money poorly. We let DISH corp itself take care of those folks. Our churn rate is below 1%.
We don't BS our customers. We are upfront with them about everything...we explain all the fine details. They know exatcly what they are getting before they sign anything. We don't make deals or promises we can't keep. Before we even sign them up they sign a "customer affirmation sheet" which indicates that everything has been explained to them and they understand and agree with it. This sheet explains in plain English many of the details of the "fine print" in the agreement before they even see the agreement. We keep this form in file in case someone ever says "You didn't tell me that." We whip out the form..."Remember this? Is that your signature?"
"Uhhhhh, yeah...I guess you did."
Eliminating high risk customers and eliminating incorrect expectations from the customer is key.
This tactic, combined with the fact that we do all we can to respond personally to the needs of our customers has, I think, really helped reduce chargebacks.
People like a familair face, and being able to call a local person for help rather than someone on the 800 number with a strange accent.
Also key is understanding and abiding by the policies and business rules in your business agreement/contract with DISH/Echostar...entering correct information...submitting paper work properly.
Have there been frustrations? Sure...any business venture will have them.