Not sure why the downvotes. This essentially is the same as my take. This is the inevitable result of pushing your brand as "no content moderation" but not actually having any skills or plans on what to do when it eventually caught up with them.

Anyone familiar with 4chan knows that some of the earliest content that was banned on the platform include childporn and organizing raids/doxxing. If you read the terms of service, you'll see that content is still banned (even if not uniformly enforced).

The fact that parler couldn't muster even 4chan levels of moderation shows you that they really had no comprehension of the content creators they would be courting with their service.