Yes, it's true, and it's separate from the retailer A B C rating system. It's basically a "quality of customer" classification. In other words, DISH got tired of all the people playing games and shopping for deals. The expectation always was that if you buy something, you pay for what you bought. Some people felt they should get much more for their dollar. This system was developed to directly counter the customer games. It doesn't reset, it lives forever and it tracks most types of activity on an account. In short, DISH KNOWS if you're playing games now, and they can and likely will treat you accordingly.
Now for the burn; CSRs aren't permitted to even acknowledge it exists. But assume if you're playing games, your account is flagged. That's essentially a true statement now.