Good for them. As a private company, they have the right to use their platform to influence public discourse as they see fit, as newspaper and book publishers have done throughout the history of our republic. Criticism of the fourth estate as biased is often the "sour grapes" reaction of any side who has failed to effectively harness the medium. Of course they are biased. Even a nominally neutral platform will be labeled partisan if the unadulterated facts it reports tend to support one policy approach over the other, or if it tends to penalize speakers of one ideology more than its opponents, even for bona fide violations of its terms of use. Facebook, Google, YouTube and Reddit's platforms are private properties. They have the right to operate their platforms as they see fit, including to influence public opinion and to silence certain opinions entirely -- this is the essence of private property rights. These websites are not public forums because America is not a socialist state.