There's been reporting that Amazon sent them some specific... Parlers (?) (IDK what the Tweet equivalent is over there) they said violated their contract or something and they weren't taken down. It's not about the speed either it's that their moderation system was completely half-assed. Keep in mind the kind of talk and planning that lead to Wednesday has been happening over there since the election and similar "hang the traitors" talk has been going on much longer basically since the site started.