Large marketplaces are among the most scraped sites on the web, and they respond with layered defences rather than one single wall. If you run a site and want to limit automated extraction, their playbook is worth studying. If you build data pipelines, it is worth studying for the opposite reason: it tells you exactly which behaviours get flagged. This post covers both sides, plainly. Why one defence is never enough Any single check can be worked around. Header checks catch n