SSAI delivers the stream 1 and fires beacons 2 -- same entity, no independent verifier. ssai=2 adds a sidecar 3 so the device fires 4: residential IP, real playback. With ssai=3, playback is inferred from segment downloads -- the server can't know if the TV is on. Bid flow 21
FIELD NOTES
- ssai=3 fires beacons on segment download, not render
- IVT 110% higher with SSAI -- server IP masks fraud
- MRC requires client-initiated counting; adoption gaps persist