Why is marketplace scraping so common?
Short answer: Because a marketplace's listing data is its core asset and it is displayed publicly at scale. Prices, inventory, seller identities, and demand signals are legible to any script with a browser. Competitors, aggregators, fraud rings, and AI training operations all read the same pages your customers do - just faster and constantly.
Who is reading your catalog
Price-intelligence vendors resell your data to your own sellers. Competing marketplaces seed supply with your listings. Fraud operations clone high-value listings as bait. Each reader has a business model; none includes asking you.
The bandwidth tax
Scraping fleets often generate more page views than human shoppers. Infrastructure scales to serve machines, DDoS-style incidents turn out to be scraping campaigns, and engineering time goes to capacity that produces no revenue.
From blocking to shaping
Mature marketplaces stop trying to keep scrapers out - impossible for public pages - and instead make automated reading unreliable and attributable: behavioral trust scores, dynamic content, canary listings. The data stays public for humans and expensive for fleets.