Seems like the example meets your criteria. There was nothing in his statements that were inherently illegal and so cancelling him for legal speech is an example of the Left's overreach among silicon valley decision-makers. This article[1] mentions more such far-right personalities that were banned for more traditional far-right views.
Milo losing his book deal was not chosen by "the Left" or "silicon valley decision-makers" as they are not the publishing company. People have lost book deals for much less. Such is business. He lost his Twitter and Facebook for harassing people and his official Youtube is doing just fine.
> Traditional far-right views
Can you give an example of a traditional far-right view any of the 3 people in the article were banned for?
The article mentions Alex Jones and Laura Loomer. They were taken off of social media repeatedly encouraging followers to harass people (mobbing). Encouraging/organizing mobbing will even get you banned from 4chan. The number of sites that allow such behavior is exceedingly low, and Alex Jones got several chances to stop before being taken off of youtube and facebook.
I have no problem with losing a book deal when you say something that endangers your ability to sell books. Regarding social media, I was referring to him being banned from Facebook for unspecific reasons[1]
Regarding Laura Loomer, her twitter ban doesn't appear to constitute harassment by any reasonable definition[2]. Even if we grant she harassed Omar on twitter, that doesn't justify being banned from payment processors, uber, and food delivery services[3].
https://www.theguardian.com/technology/2019/may/02/facebook-...