If their billion dollar valuation were real, I'd think they would have been more responsible with their business and abided by the AWS terms.
“Recently, we’ve seen a steady increase in this violent content on your website, all of which violates our terms," the email reads. "It’s clear that Parler does not have an effective process to comply with the AWS terms of service.”
An Amazon spokesperson declined to comment on the suspension.
From https://www.buzzfeednews.com/article/johnpaczkowski/amazon-p...
The difference is Facebook & Twitter take their content moderation (and it's overall impact on their business) very seriously.
From any angle you look at this, Parler failed at reasonably moderating their content. More so, at their own peril despite being warned by AWS about the violent content.
Parler got popular amongst Trump supporters and nothing draws negative press like Trump.
OTOH, their volumes did not justify the complex environment they allegedly had and they should be very well within the skill set of the very average devops engineer. No large scale deployment expertise required.