Relay decides and serves ads into contextual video across the network — direct creative and VAST, CPM / CPC / CPV — with deterministic pacing, frequency capping and brand safety built in. Revenue is recognised only at the qualifying event, never at ad start.
Category, geo, device and placement narrow the eligible campaigns for the opportunity.
A restricted or conflicting context removes demand — nothing unsafe is ever filled.
Delivery pressure and frequency caps keep campaigns on plan and viewers un-fatigued.
The eligible set competes; the winner is selected deterministically from the seed.
A direct creative or a VAST document is returned as the pre-roll — or the house slate.
An ad_start is never billable. Counting at ad start would overpay every partner and compound into finalized statements — so the billable event is the settlement anchor the whole revenue ledger reconciles against.