Linkbucks
Linkbucks is a well-established link shortener (interstitial/intermission) network that offers publishers and web users the chance to easily monetise links they share on blogs or social media.
Shorte.st
Review of Shorte.st, an interstitial link shortener ad network that offers users a way to monetise the links they share on their websites or through social media.
AdFly
Review of the AdFly (or Adf.ly) interstitial link shortener ad network, the network which essentially established the market for monetisation of shortened links to be shared on social media.
Conversant
Conversant (formerly ValueClick Media) currently represent the pick of the independent online ad networks due to their great support and service, as well as decent payouts.