HELP! Does anyone know what these mean?

These new options appeared when I updated UrBackup, but I can’t find any information as to what exactly they mean?

Do not start file backups if current estimated data usage limit per month is smaller than:

Do not start image backups if current estimated data usage limit per month is smaller than:

Please help me!

Someone will correct me if I’m wrong but here is a link https://www.urbackup.org/administration_manual.html#x1-670008.4

What I understand is that if the amount of data you can transfer is smaller than the number you enter then the server will not start a backup for that client.

The list of providers is very limited currently btw. so any contribution is appreciated: https://github.com/uroni/dataplan_db