> prohibited from profit-seeking

A more pragmatic goal might be that they are not ad or attention driven. It's the fight for attention (specifically "content" as a ruse to get you to see adds) that has led directly to the current censorship problems, as well as many other issues, in part because its created these big platforms that try to make everyone watch ads that are lightning rods for interests that want to control what people say.

I don't think subscription models suffer from the same problem, because their "content" is the actual product, not the bait, and so the communities they support are very different and their attack surface is smaller.