What is adfoc. Us? Adfoc. Us is a free short URL redirection service with a twist. Get paid for every link you share on the Internet. You can place links on FaceBook, Twitter, forums, and anywhere you share links! Earn up to $6. 50 per 1000 visits to your short URLs. Generate stats on-the-fly and break-down by countries, referrers, and specific dates.