The Ways This Business Eats People

Every failure mode in this lesson has a Reddit thread behind it, usually written by someone who thought the risk was theoretical. Read this lesson twice: once now, and once the week something here starts happening to you.

Suspension and frozen funds

The big one. Amazon can suspend an account, freeze the balance, and put inventory on hold at the same time. One seller documented a potential fifty-thousand-dollar loss when Amazon reserved all funds and halted sales on an established multi-product account. Stranded inventory in a suspended account accrues storage fees while you appeal, and Amazon can dispose of stranded units after roughly ninety days.

Mitigations: never break the rules in "Account, Entity, and the Rules You Cannot Break"; keep sales records, supplier invoices, and proof of authenticity somewhere Amazon cannot revoke; write appeals as short, factual plan-of-action letters, evidence attached, no emotion; and never spend your last reserve, because appeals take weeks and storage bills do not pause.

Dead inventory and the compounding bill

The product that does not sell does not vanish. It sits, ages past 181 days, and starts stacking the aged inventory surcharge from "Running the Loop" on top of monthly storage. Sellers end up paying rent on the evidence of their mistake. The discipline: decide kill criteria before ordering, and when a product misses them, liquidate fast. Price at breakeven, use Amazon's removal or liquidation options, take the cash, and spend it on the next loop. Losses that are cut early become lessons; losses that are nursed become subscriptions.

The PPC pit

Ads that never converge: spend continues, ACOS sits above your break-even from "Vetting the Numbers Before You Spend," and hope does the optimizing. The launch lesson set the guardrail: a capped launch budget, weekly cuts of anything not converting, and a decision date. If TACoS has not started falling by the end of the launch window, the product is telling you something. Believe it.

Fee creep and rule drift

The fee stack grows from the edges. FBA fulfillment fees rose an average of $0.08 per unit in 2026, after a quiet 2025, and a 3.5 percent fuel and logistics surcharge applies to fulfillment fees from April 2026. Small individually; together, a margin point here and there, quietly taken. The defense is boring and effective: rerun the calculator on every live product each time Amazon announces a change, and reprice or renegotiate when the margin thins.

Tariff and supply shocks

Sourcing concentrates your risk in one country's politics. Tariffs on Chinese goods swung past 100 percent at the 2025 peak before settling into truces and pauses, and the end of de minimis made even small shipments dutiable. You cannot forecast this. You can price a duty buffer into every order, get landed duty quotes in writing before deposits, and, once a product proves itself, price a second supplier, ideally outside one country.

Undercapitalization, the meta-failure

Operators on r/AmazonFBATips repeatedly name going in under-capitalized as the killer: the low-inventory fees eat your remaining margin the moment the product starts working, and the reserve you keep for ads and reorders is what usually decides whether you survive or stall. It does not look like a failure at the time; it looks like an aggressive start. Then the launch needs more than the reserve, or the reorder window arrives before payouts do, or a refund wave hits, and the business dies of thirst inside a machine that was working. The budget honesty in "What the Money Actually Looks Like" is the vaccine.

Every failure mode here has a checklist answer, and the course's capstone collects them all into one plan.