yeah. We gotta stay calm and collected on this. Collective Shout wants us to lash out with anger, because they've bragged about this. Their responses to people talking about their actions setting a precedent that means that a group can call a payment processor 1000 times to make them ban a genre of games, was basically universally this; "we love hearing about the tears of incels crying about being unable to goon about their adult games". No mention of how we're worried about the precedent, only focusing on the parts we never brought up. So clearly they love engagement and backlash.
So the only way to combat them properly is directly and through legal methods, like emailing and calling up the payment processors and voicing concerns and issues, and that if things don't get better regarding it, that your full business with them shall be taken elsewhere permanently. If enough people globally did this, the payment processors would be forced to respond because of a perceived financial threat that comes from a perspective of general content, not just adult games, and thus would require them to face their actions of potentially causing finance and reputation damage to them.
Because if it became big public news that payment processors were making up laws that decided what content is allowed to exist, they'd face scrutiny from financial groups like the FTC, who don't very much like it when a company with lots of reach and influence tries to get more. People have tried that on Steam, trying to say that Steam is a monopoly, and their counter was how every one of their competitors were not providing better services and were making themselves worse, thus establishing that they are a market leader. And given Disney,s gotten in trouble with groups like that for trying to become a monopoly, a small Australian activism group forcing American payment processors to enforce new rulings that forbid the use of injecting money into an economy outright through blackmail tactics would be very much frowned upon.