Forgotten EC2 instance: the real cause of developer financial ruin

I didn’t go broke on crypto - I spun up a single t3.micro, let Auto Scaling promote it to a fleet of p4d.24xlarge GPUs, and discovered our cost-alert SNS topic was in a dead-letter queue

The only thing that scales faster than your microservices architecture is your AWS bill when someone forgets to tear down that m5.24xlarge instance they spun up 'just for testing' during the last production incident

Every senior engineer has that one story about the time they spun up a 'quick test' EC2 instance on a Friday afternoon, forgot about it over the weekend, and returned Monday to find it had been mining cryptocurrency for someone else - or worse, just sitting idle burning through the quarterly budget while running a t2.micro that nobody needed. The real poverty isn't the AWS bill; it's explaining to finance why you need another $10K added to the cloud budget because you forgot to set up CloudWatch billing alarms or tag resources for automatic shutdown. Pro tip: if you're not using Infrastructure as Code with automatic resource lifecycle management and cost allocation tags by now, you're basically gambling with the company's money - just with worse odds than Vegas

EC2: scales compute effortlessly, bills your entire runway overnight

Nothing teaches FinOps faster than a p3.16xlarge left running because the tag-based stop policy missed 'dev'

Nothing drains runway like an untagged p4d.24xlarge behind a NAT Gateway - auto scaling’s off, but the invoice scales just fine