Ads may link to a “public” social networking account page (e.g. Facebook, YouTube, Twitter) that is controlled by the advertiser, provided the ad is otherwise compliant with these policies.
Using a sign-in page or requirement must be for a specific reason, such as for ads with age-restricted content. Advertisers can require page "likes" or application integration on social media sites before giving users access to ad offers.
Ads cannot contain Facebook platform integrations, such as the Facebook Like button, Share button or Feeds.