Free Tier Abuse Economics: When Your AI Generosity Gets Ratio'd by Bots
A startup CTO checked their OpenAI dashboard one morning and found a $67,000 invoice. Their normal monthly bill was $400. Nothing in their product had changed — no viral launch, no new feature, no marketing push. What had changed is that an attacker fingerprinted their endpoint, harvested a leaked key from a build artifact, and resold the inference at 40-60% below retail to buyers who paid in crypto. The startup paid the bill while the attacker pocketed the spread.
This is not the typical free tier abuse story SaaS founders tell each other. The typical story goes: a few power users abuse generous trials, churn rates spike, you tighten the limits, and unit economics recover within a quarter. That playbook is dead for AI products. The math broke when your unit cost per anonymous request stopped being effectively zero, and the abuse playbook scaled the moment your generosity could be liquidated for cash.
