Red Herrings is NBN’s protection upgrade, like Caprice Nisei and Ash 2X3ZB9CY, but it has not seen nearly the same amount of use. Most likely this comes from its low trash cost and its inability to protect anything other than agendas. Caprice protects herself by stopping the run, Ash costs three to trash so its more of a tax, and can protect other cards (Such as Caprice) in the server.
Red Herrings might be a card that is worth recurring however. Combined with Predictive Algorithm and maybe encountering an NAPD Contract the costs are huge for the runner to steal. As more agenda protection such as this occurs, or with other agendas that protect themselves (such as Fetal AI) this card can become more important. It would be surprising at all to see this card making a return in Never Advance style decks, especially post Clot.
(Written during the meta of Breaker Bay, part of the SanSan Cycle. For more reviews like it, visit wyldside.blogspot.com)