/$0.50 per rule per month. $0.03 per million events. Enabling Contributor Insights on a single DynamoDB table auto-creates four rules so your floor is $2.00/month before a single event is counted.
At 500 million events/month, that's $17.00/month. At 5 billion, it's $152.00/month.
Whether that's justified depends on your traffic volume, whether you have hot key patterns, and what throttling is already costing you in wasted provisioned throughput.
What Is DynamoDB Contributor Insights?
Contributor Insights for DynamoDB is a CloudWatch monitoring feature that identifies the top partition keys driving read and write traffic on a table without any code-level instrumentation or custom application logging.
