How long before outsiders find a way to cripple or shut down Gab?
They've been through it already.
That's why they built their own infrastructure.
Gab Just Became Resilient In A Big Way
https://news.gab.com/2020/09/30/gab-just-became-resilient-in-a-big-way/
Shut off the gas and electricity.
They tried it already and Gab adjusted.
There are plenty of alternatives out there. Gab, Rumble, Parler, etc.