Reverse Engineering Traffic Source Sites?

Hi,

I would like to know what is the best way to reverse engineering the targets a traffic source has when they are just providing you with blank IDs.

Right now I’ve a list of 150 sites organized by traffic sources, volume, vertical, top GEOs, how distributed is the traffic among these GEOs but it’s hard to grow it, specially with some traffic sources that are not well known but have lots of traffic.

I am using these three methods to get sites using a certain technol ...