I noticed in advertising that many search engines get
their results directly from other engines. In this case
if you ranked high in the engine feeding those, you would
rank high in the sites getting their results from the main engine.
I see a similar trend with online yellow page and local listings.
Does anyone know of a compiled list of where all these listings
get their listings from?
For example i know superpages.com feeds 8 other sites, but
each of those sites charge to get listed? But when i sign up
for superpages i automatically get listed in the other 8?