While the Daily Stormer is vile and there's no reason to be sympathetic to them, and businesses should generally be free to choose who they do business with, this does raise interesting questions about the suppression of thought on the Internet. Even Russia did not accept them as "Internet refugees". Limiting speech and thought tends to be a slippery slope.
There's no record of this happening with mainstream conservative sites and I don't expect it to happen anytime soon. Anyone is also free to find them on the dark web.