Throughput is determined by the carriers based on who is sending the message (the brand) and what is being sent (the use case and vertical), not on the amount of numbers/10DLCs associated with a campaign.
The table below explains how AT&T and T-Mobile/Sprint define each message tier and map trust scores:
Note:Verizon is still working on defining its process.
Carriers require a ‘special business review’ request; in case a brand is not satisfied with the defined TPM or message quota. T-Mobile and Sprint charge $5,000 USD to submit a ‘special business review’ request. This fee is non-refundable.