That's the point. Booting Parler off of AWS isn't illegal either. You know, conservative principles of free enterprise and all. AWS isn't government that will protect free speech.
While AWS will act on anything that's reported, they are well known to do absolutely nothing in addition to that to stop the rampant usage of their platform to spread child pornography, unlike FB and other platforms which invest heavily in stopping the spread of child abuse material.
Amazon AWS really don't care about what goes on their platform unless it becomes a potential PR issue.
https://www.nytimes.com/interactive/2019/11/09/us/internet-c...