This option lets you block some of the sub accounts 1&2 definitions. Write one or more values delimited by comma for filter sub account. Available only digits, letters, commas.
This is an example of how it works:
If you put abc here - it means that all the definitions except &sub1=abc will be disabled
If you select the «except» checkbox - it means that the sub account (&sub1=abc) only will be disabled