Stoutline · single‑SKU brand studio
One boring SKU. Amazon FBA to TikTok Shop. $500/day, day after day.
Five sequenced packages — niche-sourcing scorecard, fee math, a 30-day launch playbook, CPM padding, and a compliance lift — bridging Amazon FBA + TikTok Shop via MCF so a single line clears $500/day across both storefronts.
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The thesis
Trend‑driven SKUs flatten out. Heavy, durable categories keep clearing revenue.
The 2026 Amazon policy turn bends fee economics toward heavy / "Small Bulky" inventory, and Fulfilled by TikTok sits at 8–14% of GMV. Two fee structures, both friendly, both pointed at the same shape of product. And on the demand side, the launch‑cost reality of TikTok CPMs in the first 30 days has reshaped what a single‑SKU line actually needs to make.
Stoutline exists to package that intersection — a niche-sourcing scorecard, fee math, a 30-day launch playbook, CPM padding, and a compliance lift — so a seller can run one well‑picked line into a $500/day grind instead of treating it as a passive side hustle.
Who it’s for
Three sellers this is built for.
Solo FBA sellers at $5–15k/mo
Already running one line on Amazon and need to either expand channels or re-shape SKU for the 2026 fee band — without restarting from zero.
Burnt trend‑hunters
Cycled through two-plus trend SKUs in the last 18 months. Looking for category-shape work that doesn’t depend on the next viral wave.
TikTok‑first pet / kitchen creators
Building from an audience in pet or kitchen and need an Amazon listing that catches cold Prime traffic when TikTok traffic lands on it.
In the package
Five pieces of work, in the order they actually matter.
The 2026 ecom playbook is a sequencing problem as much as a sourcing one. The order below is the order the playbook runs.
Niche-sourcing scorecard
Score the niche before you swing for it.
A 12-axis scorecard against Amazon’s current catalog — heavy, "Small Bulky", pet, kitchen, home organization — so the first port is shape-selected, not trend-selected. Same scorecard lives at /scorecard.
Fee math
Run Amazon FBA + TikTok Shop numbers side by side.
Both fee structures sit in the 8–14% band for the right shape of product. The fee math shows the COGS ceiling that makes a $500/day line work across both storefronts without re-tooling operations.
30-day launch playbook
Thirty days, ordered: Amazon listing → MCF → FBT → paid social.
Stand the Amazon listing up first (photos, copy, A+, cold-traffic PPC) so the TikTok traffic that lands on Prime hits a ranked, review-loaded detail page. Then port the same inventory to TikTok Shop via Amazon MCF.
CPM padding
Cushion for the first-30-day TikTok CPMs.
TikTok CPMs in the first 30 days are paid up-front, before a single verified order lands. The playbook sizes a $5–$20k/mo line with the working capital it actually needs — not the figure that feels good on a Notion page.
Compliance
Cover the new TikTok Shop rules on pet and kitchen SKUs.
The 2026 tightening on certain pet and kitchen categories is a documentation pass — the category line, the labeling proof, the supplier paperwork. Packaged so the listing doesn’t get pulled.
Fee math
$500/day is what a single $5–20k/mo line actually looks like.
Amazon FBA + TikTok Shop via MCF — one warehouse, one pick, one ship, two storefronts. Both fee structures sit in the 8–14% band for the right shape of product. The breakdown below is where the math lives.
- Amazon FBA8–12% fulfilment
The "Small Bulky" tier lands here. Heavy items that used to be uneconomic on FBA now clear fees on the same COGS as flat-pack.
- TikTok Shop (FBT)8–14% of GMV
Fulfilled by TikTok runs on the Amazon outbound network. One pick, one ship, two storefronts. No retooling operations.
- The line$500/day → ~$15k/mo
A single SKU at $500/day is a real small business, not a side project. Stack one durable line before you chase the second.
Get the brief
One boring SKU. $500/day. Send a line, get the brief.
No form. No funnel. One email. The brief covers the five packages — niche selection, fee math, the 30-day launch playbook, CPM padding, and the compliance lift.
Or just reply — we read everything.