The usual lynch mobs (which FB & Twitter allow on their platform) reported it en masse I'm guessing. This works well for getting conservatives banned on social media because their report systems are somewhat automated, but it also works for domains and email providers. I think they recently got Gab booted off Azure too.
It's frankly incredible that you decide to use the term "lynch mob" to describe people criticising platforms that are notable exactly for supporting literal lynch mobs and people encouraging actual murderers. Equally baffling is the equating of the criticism of these platforms to criticism of conservatives in general, which seems like something anybody with any respect for conservatives would want to avoid.