I am a fairly conservative-leaning person who has been quite blessed under capitalism and is not particularly against some of its basic ideas, yet I still intend to participate in this jam. As far as I can tell, participation is fairly open, and there are a multitude of reasons someone might want to participate. I didn't see anything saying you have to be 100% anti-capitalist to participate. So maybe consider toning down the implications that all of us here are radical communists who want to dismantle all of Western society.
I think there is and should be room for capitalists to at least explore some anti-capitalist ideas in this jam. That's certainly how I'm approaching it. It's just kind of frustrating to log in checking for activity and feeling lectured by a bunch of people who clearly don't understand where I'm coming from.