> The right of free speech doesn't mean that private corporations have to be a platform for it.
Free Speech is a principle that the First Amendment applies when restricting government. Private corporations that decide to be a platform for public speech (I think publicly accessible social media posts count) have to consider how they promote free speech. If, on the other hand, the private corporations want to exercise their freedom of association and take clear editorial positions, that's fine too. But, philosophically, they can't have it both ways.
Also note that Google, Facebook, and Apple seemed to have coordinated the ban. Both in size and in style, this is a different beast than Masterpiece.
Finally, Masterpiece was about being compelled to make specific cakes. Customers weren't banned from all cakes or anything. In that way it resembles demonetizing specific YouTube videos more than banning entire channels.
* I think it's fine to boot Alex Jones on the merits, for the record. Though the level of coordination among the BigCos here is concerning.