Short answer: Data collection rules vary by channel. MD-sourced channels (e.g., Olive Young) are collected exhaustively across the category. Open marketplaces (e.g., Amazon) are collected based on the top 100 bestsellers.
Collection methodology by channel type
Channel type | Examples | Collection rule |
MD-sourced channels | Olive Young, etc. | Exhaustive within category |
Open marketplaces | Amazon, etc. | Top 100 bestsellers |
When verification is needed
If a count looks significantly different from what you expected, email [email protected] with: channel 路 category 路 time range 路 comparison URL (if applicable).
Common follow-up questions
Why do item counts differ so much across channels for the same category?
MD-sourced channels capture all items, while open marketplaces capture only the top 100. Channels also use different category taxonomies.
The lower count makes me worried about analysis reliability
The top 100 on open marketplaces accounts for the majority of category sales and review activity. Trend consistency and signal direction matter more than raw count.