You guys wanna have a voice and give Square a powerful message they can't ignore?
Don't buy their shit.
The almighty dollar speaks volumes. It's louder than any letter, petition, review, etc. If they see no one's buying their half assed bullshit, then guess what? They'll all cry and Wada will have to get his shit pushed in by a punch of pissed off shareholders who want to know why the fuck their profits are failing not just in Japan but in the US too.
Don't buy their shit. THEN negatively review it and say how bullshit it is. And guess what?
They'll have no choice but to go to the table and say, "I'm sorry we lost your trust, what can we do?"
Seriously. Trying to reason with them and make them see the error of their ways is not gonna do shit. Unless they lose money, they won't give a damn. That's the kind of company they are right now.