if I am YT creator and I punch someone in a barI don't think it matters if the other person has a YT subscription. If you create videos about, say, beekeeping and you get in a random bar fight, no, probably not. IF you're some sort of 'influencer' and your public persona is all about being a tough-talking badass, such that your getting into a bar fight makes you the Main character in the entertainment/gossip pages for several days, then they might dump you because they don't want next weeks story to be 'YouTube subsidizes karaterobot's hard-drinking combat LARP.'
It's not a balanced appraisal of facts and harms and injury allocation like in a tort lawsuit; more a seat-of-the-pants executive judgement call on 'does hanging out with this guy commercially make us look bad?' If the answer is yes, then you suddenly no longer have a commercial relationship. It's similar to the 'morals clauses' in the contracts of TV and movie stars, but with the difference that tech firms basically set contractual terms unilaterally and the network effects are so strong that that no individual performer has any kind of leverage to request anything different.
It's worth understanding that the incredible concentration of corporate power on digital platforms is due to a mix of technological moats, the first-mover advantage of preferential attachment, and a philosophical shift away from breaking up monopolies, on the theory that large entities often deliver greater consumer benefits than a competitive market place, a viewpoint famously summarized here: https://scholarship.law.upenn.edu/cgi/viewcontent.cgi?articl...