86 Random reflection: Key to AWS costs is to always assume every compute, storage or networking unit incurs cost. Always. Then got to (a) pricing of the servi

86 Random reflection: Key to AWS costs is to always assume every compute, storage or networking unit incurs cost. Always. Then got to (a) pricing of the service in question, (b) FAQ of the service, (c) pricing and FAQ for EC2 specifically and scan for every pricing information you can. If after that you can be 100% sure something does not incur cost, only then you are allowed to remove it from your financial model of what you want to deploy. You do have a financial model, right?