You don't get charge for transit if you are sending stuff IN from the internet or to any other AWS resource in that region. So there is no QOS constraint inside

You don't get charge for transit if you are sending stuff IN from the internet or to any other AWS resource in that region. So there is no QOS constraint inside except for perhaps paying for the S3 GET/SELECT/LIST costs. It is pretty much exclusively to lock you into their services. It heavily impacts multi-cloud and outside of AWS service decisions when your data lives in AWS and is taxed at 5-9 cents a GB to come out. We have settled for inferior AWS solutions at times because the cost of moving things out is prohibitive (IE AWS Backup vs other providers)