In this case, OnlyFans made the choice (and reversed it), not the payment provider. Granted, they did it because of the payment provider, but Twitter etc don't make their decisions in a vacuum either, they react to different kinds of pressure.
That said, the same people made the same arguments ("private businesses, no rules should apply") with payment providers boycotting Gab, but turn around now. Will they learn that political pressure via businesses is a bad idea because it might affect them next? Doubtful, they haven't learned it the first few times.
Onlyfans made the "choice" the way someone with a gun to their head makes a "choice".
It's meaningless to suggest they had one.
And I'm a concrete example of someone who considers Gab a haven of extremism, but who still believes payment processors should not be allowed to boycott legal businesses.
Sure, just as Twitter, Facebook and the cloud providers make a "choice" when they ban someone who has become a persona non grata in the establishment media. Nobody does anything out of ideology at that level, it's all damage control.
The WSJ imagines pewdiepie to be Hitler incarnate? Advertisers pull their ads and Disney has to cut ties. Not because they think pewdiepie is a Nazi, but because there's only one "choice".
This is nothing new, it's been done before, but it hurts a different group this time, so the people who celebrated these same actions are now angry that this kind of thing is allowed to happen.
That said, the same people made the same arguments ("private businesses, no rules should apply") with payment providers boycotting Gab, but turn around now. Will they learn that political pressure via businesses is a bad idea because it might affect them next? Doubtful, they haven't learned it the first few times.