Cloudflare runs a popular content delivery network that specializes in protecting clients from distributed denial-of-service attacks. The Daily Stormer published a post mocking a woman who was killed during the white supremacist protests in Charlottesville, Virginia in August. That had made a lot of people angry at the Daily Stormer, attracting massive attacks on the site.
The Stormer was a Cloudflare customer. Cloudflare had ample technical resources to battle DDOS attacks. The problem was that other Cloudflare customers started calling and threatening to cancel their service if Cloudflare didn't cut the Daily Stormer off.
Gee, it's almost like the Free Market has decided that if your company takes Nazi money to help literal Nazis further their Nazi cause, then other, non-Nazis might choose to take their business elsewhere.
Isn't this the Libertarian Ideal?