Developer shares costly lesson after $150 Cloudflare overpayment

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A developer creating an app for flight monitoring shared a story of an unexpected $150 bill from Cloudflare. The overpayment occurred due to a billing structure that separates database reads and writes. While heavily optimizing API usage, the developer inadvertently performed roughly 150 million database writes in a month, exceeding the plan's limits. This incident highlighted the importance of monitoring all billing parameters and setting up alerts for cloud services.

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