As explained in the Cause section of this article, the observed behavior is expected due to how the Cost Analysis system extrapolates costs.
Consider using the filters within the Cost Analysis tool to visualize future cost estimates more accurately.
If you have concerns about the expected costs, log in to your Veeam Data Cloud instance and navigate to the billing tab. Here, you can confirm the number of users and the price per user.
This form is only for KB Feedback/Suggestions, if you need help with the software open a support case