Okay but usually businesses deal with this not by having no dependencies and doing everything themselves. Instead they establish business relationships that ens

Okay but usually businesses deal with this not by having no dependencies and doing everything themselves. Instead they establish business relationships that ensure they do have a recourse, such as through contractual obligations. Likewise, if the concern is that Github automatically bans you without a recourse, then my preferred solution is that they do introduce recourse. This could even be a paid option: I think it's entirely reasonable for them to ask an administration fee for the appeal process, just to cover the costs of having a human look at what's going on and providing a good explanation.