Hi there,

I only use Google for advertising and I've been wondering
if Yahoo allows direct linking to sites of products I promote
or everything must go through my landing pages first.
Any help would be appreciated.
Thanks

Earlier direct linking was not allowed but Yahoo Search Now Allows Direct Linking.
This policy has created opportunities for publishers and advertisers.
Refer to this link for more information on Direct linking in Yahoo
http://cashtactics.net/02/15/yahoo-search-now-allows-direct-linking.html