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Decoding the math.

Every post is built around one thing: a fee, a rule, or a calculator. Practical, never padded.

May 30, 2026 · etsy

Etsy Fees Decoded: Why Your Margin Is 30% Less Than You Think

The four-fee stack on every Etsy sale, the Offsite Ads trap that hits at $10K, and how to predict your real net before pricing a single product.

May 30, 2026 · tiktok-shop

TikTok Shop in 2026: Fees, Creator Commissions, and Where the Margin Actually Goes

The full TikTok Shop seller fee schedule for US, UK, and Southeast Asia in 2026 — plus the creator commission decision that quietly destroys POD margins.

May 29, 2026 · temu

Temu Tariffs Explained: Why Your $20 Order Costs $32

The 2026 changes to US de minimis and EU IOSS, what they mean for cross-border shoppers, and how to predict your true landed cost before clicking Buy.

May 29, 2026 · redbubble

The Hidden Math Behind Redbubble Tier Fees in 2026

Standard vs Premium accounts, the quarterly tier multiplier explained, and the price points where margin flips from thin to healthy. With worked examples.