Data Addon Price list:

WATS offers multiple pre-paid data plans to give you a fixed and predictable subscription cost. These data plans are based on the amount of test data you plan to upload for processing, regardless of how many systems you source this data from or how many users need access to the data. Read more about the data plans and how to calculate the amount of data needed 

Add additional data to your included 50 MB/ 100 MB  (Analytics/ Enterprise) subscription, from 100 MB up to more than 300 MB.