White-Label Margin Stack

White-label margin is not the sticker price of the builder. It is the sum of platform seat cost, the hours a client's revision cycle actually consumes, and the support scope the retainer implies. Agencies that price from the platform fee alone discover the gap in month two, when a client's third round of copy edits lands on a junior designer. The stack model forces each layer onto the offer sheet before the proposal goes out: what the platform charges per site, what a typical revision round costs in labor, and what ongoing support the client expects. A white-label plan at $159/mo (Brizy) looks cheap until two hours of monthly edits at a $75 blended rate add $150 to the same site. Stack the layers, set the retainer floor above the sum, and the offer survives renewal.