There isn’t much wiggle room as the moderators want to keep political conversation in forums that restrict posts.
Both governments and companies are run by people. But only government can restrict your rights if they don’t like what’s going on. Government wields the gun. On the other hand small businesses are what make up the vast majority of the US economy and, as such, feel a tremendous obligation to better their communities. I think this is about as far as can take this without having this entire conversation deleted.
In Law, that's a discussion of power
de facto vs power
de jure.
In theory, companies don't hold powers over citizens; the state does ("legal" power, or
de jure); in practice, however, large organizations DO hold power when they can interfere with the state or become a monopoly.
Here's an example: suppose that all companies in the country in your sector require you to have a LinkedIn profile. However, LinkedIn unfairly and unilaterally devices it doesn't want you to have an account there, so it bans you. In this case, LinkedIn has power in practice (although indirectly) over you and your sector.
The list goes on and on. Suppose that, instead, credit companies where you live require you to have a Google Wallet for payment processing; they accept nothing else. However, one day, Google inexplicably deletes your account.
In theory, it's within Google's right to delete your account out of the blue simply because it doesn't like it; they don't need to give any explanations. In practice, however, Google holds some de facto power that is interfering with your fundamental rights.
That's not even getting in the point of when companies use their power to overthrow governments or to lobby for legislation to be steered to whatever is more favorable to them.