Once a brand has been approved, carriers will place each brand in their own class or tier level based on their assessment of how trustworthy the brand is.
Class and Tier levels will have different throughput rates and even different surcharges. The higher the brand tier, the higher the throughput rates and lower the surcharge rates.
Repeated violations of spam or content policies can lead to lowering of the brand tier. This can drastically slow down the brand’s allowed throughput rates, as well as lead to more expensive surcharges.