A user on Reddit reported a sudden and massive increase in their Claude Pro plan usage, resulting in an unexpected 300 euro charge for extra usage. The user claims they did not use API keys or engage in any unusual activity that would justify this spike. They have contacted Anthropic support for a refund and an explanation but have received limited assistance, with the AI agent only able to reverse recurring costs, not prepaid ones. AI
IMPACT Potential user frustration with AI service billing and support could impact adoption.
RANK_REASON User complaint about product usage and billing, not a product release or company announcement.
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