While I certainly agree that you need be very careful when choosing a DISH sales partner (retailer), some of us are reputable businesses who practice ethically. Retailers are required to offer DISH rates and promotions and are shut down if they don't comply with DISH standards.
There are only 3 things that retailers are allowed to do that DISH does not:
1) Offer extra incentives
2) Charge processing fees
3) Ask customers to sign third-party contracts
However, this does not mean that every DISH retailer does all three. To use my company as an example, we do not include third-party contracts in the ordering process or charge processing fees, but we do send out weekly batches of rebate checks (our incentive).
Not every retailer does business the same way, but I thought you should be aware of what they are allowed and not allowed to do for your own reference. All DISH rates and promotions must be honored by any retailer, and if you see that they are charging different rates, denying you DISH offers, or doing anything outside of what DISH permits their retailers to do, I would be concerned and would check out other options.