Minimum Requirements to Join
Domain - Owned or freedomain(subdomain).
Traffic - No minimum traffic requirements.
Should have a US Taxpayer ID.
PayPal Account (If you want payment through PayPal)
The Ad Unit must be clearly marked as "Ads by Yahoo!" and cannot be obscured in any way. Must be shown in the requested page, not as a pop-up or pop-under window or in an e-mail. The website must be content-based, fully functional and not contain any broken links. Ads should not be placed in Non-content pages include domain registration pages, welcome pages, error pages, and Web content generated in or through software applications. Webpage must in English or Spanish and be consistent with the language of the Listings. Page must respond adequately to user requests. Website must not actively encourage users to click on Ad Units. Should not disable the browser's back button. Must not spawn more than one partial pop-up/pop-under window and this window must not interfere with user navigation. Should not automatically replace the browser homepage. Must not prompt a user to download files or programs to access your site. Should not automatically install files or programs on the user's machine.