> But those license changes were a response to how AWS was monetizing their work in ways unsustainable for the upstream projects

Or seen from the other side, these projects chose initial licenses that didn't fit with their wants for how others should use their project, in this mind.

If you use a license that gives people the freedom to host your project as a service and make money that way, without paying you, and your goal was to make money that specific way, it kind of feels like you chose the wrong license here.

What was unsustainable (considering this perspective) was less that outside actors did what they were allowed to do, and more that they chose a license that was incompatible with their actual goals.