Despite the rapid growth the social network still remained some way off its mainstream competitors.
Users could "echo" posts they wished to share with their own followers. "I believe we were treated unfairly". Last week, Facebook and Instagram froze President Trump's accounts indefinitely, and banned the phrase, "Stop the Steal".
Parler, which was founded in 2018, is a social media network which styles itself as a "free speech-driven" space. For instance, after the Capitol Hill violence, numerous posts on Parler called for mass executions of "left traitors".
'We are the closest thing to competition Facebook or Twitter has seen in many years. In January, it said it has over 12 million registered users. But Parler has another powerful backer: investor and co-founder Rebekah Mercer, daughter of billionaire hedge-fund investor Robert Mercer. Snapchat has also banned Trump.
Amazon said it reported more than 100 pieces of content advocating violence to Parler in November and December, including posts such as "after the firing squads are done with the politicians the teachers are next", and "death to @zuckerberg @realjeffbezos @jackdorsey @pichai".
Experts like Jesse Littlewood, vice president of campaigns at the nonpartisan watchdog group Common Cause, say the lack of moderation on apps like Parler is normalizing hate speech and other forms of "toxic" online content.
"We suspended them, we did not ban them", Cook added, responding to a question referring to Parler's CEO. The company refused to do this.
"We have always supported diverse points of view being represented on the App Store, but there is no place on our platform for threats of violence and illegal activity", the company said.
The lawsuit, filed in the United States District Court for the Western District of Washington, follows Amazon's decision to boot the site off of its web hosting service effective Sunday over "a steady increase in violent content".
It comes just after tech giant Amazon told Parler it would lose access to its servers for its failure to properly police violent content.
Amazon then confirmed it would suspend the platform from its cloud hosting services for allowing "threats of violence". Parler also initially failed to serve Amazon with its complaint, in violation of court rules. The app needs only to comply with Apple's Terms of Service to be reinstated, but it may be more complicated than that.
"AWS's decision to effectively terminate Parler's account is apparently motivated by political animus", the complaint reads.