Yahoo again is sending out promotional codes worth a $25 credit via postal mail to help you sign up for Yahoo! Search Marketing.
If you want to try to pull in a larger number of holiday shoppers and are thinking about trying out this advertisement method, starting with an extra $25 ad budget gives you a little cushion to start. Granted I would like to see a higher incentive (in the past, Yahoo has offered $50).
If you do not receive a postcard directly from Yahoo, you can always use this link to Sign up and get a $25 credit. You must be a new advertiser to Yahoo to get the credit.
Yahoo! Sponsored Search ads appear on the top of search results of leading sites like Yahoo!, AltaVista and CNN.com.