Sari

Hey guys, Is anyone aware of a solution for passbacks in Revive? I'm not talking about the zone passbacks which is a totally different thing. Meaning that if an empty tag is served it then calls for the second tag in line, "waterfall". in addition, what about RTB (realtime bidding), retargeting in the sense of ages, gender, content and etc...? help is appreciated, Sari Jaber