Eventbridge can translate a lot of useful internal Amazon events into a call to say a Lamdba, so you can drive custom behaviour from those events. For example: high vulnerabilities in your pushed ECR image could trigger lambda to fire off an alert(or delete the image).
Fargate supports autoscaling options that include `FARGATE` or `FARGATESPOT` for spot pricing.
P99 and P95 latency refer to the percentage of requests should be faster than given latency.
Currently, ~5% of spot instances are getting taken out, but their pricing is 1/3 of an On-Demand instance.