I believe you are referring to bringing data into the UDH either by Omnichannel (batch file process) or the Tealium Collect API (real-time endpoint). Correct?
If so, please see my comments below.
Tealium Collect API
All events feeding into the UDH effect your contract price. Please contact your Sales Representation or Account Manager to ensure you have sufficient volume so that you do not incur overages.
Please let me know if this helps answer your question.