I remember reading a blog post many years ago that stuck with me, I don't remember the title of the post or who wrote it but it was essentially along the lines of "beware when companies start to take away the free snacks". It made a pretty convincing argument about how even seemingly minor changes like that start to signal a greater shift in the companies attitude toward how they want to treat and be perceived by their staff.

I think a lot of Amazonians, even those who choose to stay, will look back on this as their "no more free snacks" moment (I also think there are probably many Amazonians who are already past that point, but that is a different topic).