How do reseller bots clear out limited marketplace drops?

The preparation layer

By drop day, the accounts, payment instruments, and shipping addresses are already warmed up with small legitimate purchases. Marketplaces that only apply friction at checkout are filtering a transaction that was engineered to look normal weeks earlier.

Checkout as an API

Bots do not use the page; they replay the checkout API calls directly with harvested session tokens. Any step the client app can do, a script can do faster. Protection has to live at the API layer with behavioral and device signals, not in the interface.

Measuring the real impact

The tell is not sellout speed but the aftermarket: listings on resale platforms within minutes, at scale, from repeat seller clusters. Tying aftermarket velocity back to buyer cohorts shows exactly how much of each drop never reached a real customer.