It is strange that bandwidth/traffic/egress seems to be an afterthought in this post and I think the numbers in the linked blog post are wrong anyway.

Bandwidth out of AWS is at best 9 cents per gigabyte, which is HUGE and for many applications the primary cost.

Indeed when I saw the title of the post I thought "there's only one number you need to know with AWS, it's 9 cents per gigabyte".

Please correct me if I am wrong. I went looking to find the correct number but as always it is hard to find the exact prices.