Five slots sound like enough until they are not. The first failure mode buyers hit is treating slot count as the only constraint. Meta's review pipeline scores a BM based on its owning profile, its billing history, its ad-account naming patterns, and the diversity of its creative inventory. Five well-tended slots survive better than nine poorly tended ones, and that is the lesson buyers learn after their first quarter.
BM5 stock that comes pre-attached to an aged profile with twelve months of natural Facebook activity reads to Meta as an established small-business advertiser. BM5 stock attached to a fresh PVA reads as a freshly minted account fishing for ad spend. The price difference between the two is the cost of survival, and the survival difference is roughly thirty percentage points in the first review wave.
Coverage in this category runs against an internal test fleet of two hundred BM5 configurations purchased anonymously across nine vendors. When a vendor's stock changes — quality up or down — the relevant articles get a revision marker and the change goes into the public diff log.
