There's also opportunity cost. What if you instead of hiring a team of 10 people (probably need more, managers, distributed geographically etc), you hire more d

There's also opportunity cost. What if you instead of hiring a team of 10 people (probably need more, managers, distributed geographically etc), you hire more developers, marketing, sales and increase revenue. So instead of saving $2M, you make $3M more revenue. Making up numbers of course, but companies can estimate this. If that's the case it makes sense to keep paying AWS, until the ratio changes, and then they can cut costs.