Allowed sub account 1, 2
The option lets you block some of the sub accounts 1&2 values on offer level. Type one or more values delimited by comma in order to set sub accounts restrictions.
For ex.: if you put abc here - it means that only this sub account value will be accepted - means: whitelist the sub1,2 values.
If you select the 'Block' checkbox - it means that the sub account (&sub1=abc) only will be blocked - means: blacklist the sub1,2 values.
Sub1 AND Sub2 restrictions
If the data in affiliate's tracking URL coincides at least with one pair of sub1+sub2 => click will be redirected to the Trafficback URL.
Block traffic if ... is empty
You can also block traffic acceptance through the empty sub1 - sub8 account params. If the affiliate's tracking URL has missing sub account param - a click will be redirected to the Local Trafficback URL.
Should you have any further questions on the matter, feel free to contact firstname.lastname@example.org