I hit that scenario, when we create tons of small files (e.g. < 10KB ones). In that use case it is often cheaper and easier just to use database such as DynamoD

I hit that scenario, when we create tons of small files (e.g. < 10KB ones). In that use case it is often cheaper and easier just to use database such as DynamoDB. See my other comment, it got link to article about S3 costs optimizations which got more detailed recommendation.