Every merchant in this category watches the wrong number. There are two lines and they are nowhere near each other: the one that fines you, and the one that quietly gets you offboarded by an acquirer protecting its own portfolio.
The gate. An order is released when the destination permits the category and the age check is on the record — and not before. A shipment that should not have gone is not a customer-service problem, it is the fine and the licence.
Everything the gate is refusing to release, and the sentence that explains each one. A held order is money you have not lost yet.
A rolling reserve is not a fee, it is your working capital sitting in somebody else's account on a schedule you did not choose. Adult merchants routinely discover the size of it in the week they need to buy stock.
Categories rather than products, because a customs schedule and a state statute both ban a kind of thing. A catalogue of four thousand SKUs has perhaps eight answers in it.