Up-until now, the only way to limit traffic to your campaigns to only a selective number of sources (subids) was to create a campaign with a very low bid and set an higher one for your chosen subids only. Although this solution did the work, it was harder to maintain and manage.
Now you can easily whitelist your chosen sources by clicking the "Whitelist Subids" sub-menu the campaign management links:
Now you can easily copy & paste sources from your tracking platform (or reports) directly, one per line:
Please pay attention that once you type in even one source - the whitelisting takes over other targeting that you may have set like categories, keywords or even subid blacklisting. Only the sources that you have chosen here will send traffic to your campaigns and all others will be blocked.
We hope that these new improvements will help you get the most out of your campaigns. As always, if you have any question or request please open a support ticket or contact an account manager.