Reasons to group campaigns:http://blog.clickint.net/index.php/2010/02/reasons-to-group-campaigns/
Why did we come up with this idea? Here are some of the reasons:
REASON 1
• If you have 2 campaigns, for example: Diet Pills (US, CA), and My best Diet Pills (US, CA, UK, MX). Which one to use? The one who take more countries or the one with the biggest payout?… This is not good… why we can’t use both? Well now you can, if you are getting visitors from MX or UK you can load the one that allow them to check, if the visitor is from US or CA then show them the biggest payout!!! Improve your affiliate programs earnings
REASON 2
• Why if you are running an affiliate program and get some Geo Targeted campaign you are using the network default redirect? I want to use something mine, and I want to monetize that
REASON 3
• As simple as you can be improving your affiliate revenue by monetizing your international traffic
REASON 4
• What if you have 2 campaigns, accepting US traffic, and one is not converting for some users, but they want to see some other banner? What if other campaign can work on that spot, why don’t try both at the same time?
REASON 5
• As a webmaster you don’t want to show your users an error like:

or: