Despite much acclaim for referring content to other sites, Pinterest has taken steps to block or disable many sharing links in an effort to fight spam reports All Things D. Pinterest is hindering the use of many tools (mostly link shortners) commonly used by marketers to track referrals from other websites.
According to a Pinterest support page, you may see a “Sorry!” sign when you are using:
• The pin links to a redirect or URL shortener instead of directly to the source. For the best experience, users should link pins directly to the source, and not to links or URL shorteners which direct users elsewhere.
• The owner of the site has been reported as spamming on Pinterest to gain traffic.
• The site itself has been reported as misleading or inappropriate.
• The site has otherwise violated Pinterest's Terms of Service or Acceptable Use Policy.
There is speculation that Pinterest may be coming out with their own marketing referral program. Even with all this speculation, a site with over 31.9 million unique visitors according to comScore, is worth attention of the marketing community.