Our Methodology

Data Collection & Methodology

SideHustleIntel operates on a structured, transparent approach to fee data. We collect and maintain marketplace fee information through three primary channels: official platform documentation, seller central help pages, and quarterly direct verification against live seller accounts. This multi-source approach minimizes the risk of outdated or inaccurate data entering our system.

Fee Data Sources

All fee information originates from official platform sources. We monitor Amazon Seller Central, eBay Seller Center, Shopify documentation, and equivalent official resources for each supported marketplace. When platforms publish fee changes, we cross-reference announcements across multiple help pages and official communications to ensure accuracy. Quarterly verification involves testing fee calculations against actual seller account dashboards to catch any discrepancies between published rates and live platform behavior.

Update Frequency

Fee data is updated quarterly as a baseline schedule. However, updates occur immediately when platforms announce changes through official channels. Most major marketplaces provide advance notice of fee adjustments, allowing us to incorporate changes before they take effect. We maintain a changelog documenting all fee modifications with effective dates so you can track what changed and when.

Data Structure & JSON Files

We never hardcode fee percentages or values into our codebase. All fee data lives in structured JSON files organized by marketplace, category, and fee type. These files contain: base commission rates, category-specific surcharges, weight-based fees, fulfillment costs, advertising minimums, and seasonal adjustments. This architecture ensures a single source of truth. When a fee changes, we update one JSON file—all downstream content and calculations automatically reflect the change.

AI-Generated Content Generation

Our profitability guides are generated by Claude Haiku using these structured fee files as source data. When you request a guide, the AI reads the current fee data, generates relevant analysis, and caches the output on first request. This approach ensures guides always reflect current fees without manual rewrites. Admins can regenerate guides through the dashboard whenever fees update, ensuring content stays synchronized with data.

Critical Limitations

SideHustleIntel provides data-driven guidance, not financial or legal advice. Fee structures vary by account tier, geography, and seller performance metrics. Always verify critical numbers directly with the platform before making business decisions. Platform fee changes can occur between our quarterly updates. We maintain best-effort accuracy, but marketplace policies shift frequently and sometimes without advance notice. Use this tool as a research starting point—not as your sole source for financial decisions involving thousands of dollars.