Too Long; Didn't Read
Cloud services operate on a pay-per-use model, which means you will be billed monthly for what you have consumed. A good piece of advice is to control the components of your architecture that can potentially consume resources unchecked, like the S3 storage buckets. The days of the application monolith architecture are over, and developers everywhere are breaking up monoliths into smaller services (components) to make further development easier and scale-up parts that have become performance bottlenecks.