content: They are not infringing on "freedom of speech". They are not violating an Americans 1st Amendment rights.  They are applying rules to using their service. You are not required by law to use Github or Reddit. Likewise -- they are not require, by law, to give you service. Find someone else to use or start your own. As you'll learn, as Voat.co recently did, that this is not easy. Bandwidth isn't cheap and software doesn't always scale the way you planned it to.