Earlier quoted context omitted.
You sure it's a free market of ideas ? What do you make of intellectual property ? Content zoning ? Media consolidation ? On social media : what do you make of algorithmically selected content ? Thought bubbles ?
People who engage with social media do so freely. If the content wasn't what they wanted or sought out, it wouldn't be popular and successful. Would you rather have it policed? A grand council that determines which algorithms you may enjoy and which are verboten?
That's quite an assumption, one that is frequently called into question on this very site. The very largest social media sites have growth strategies unavailable to smaller competitors - "the rich get richer". People who want to participate in any social media are forced to join the largest ones purely to follow the crowd. When I'm out and about in the real world and I see small handfuls of social media icons plastered on things, it doesn't feel like a "free marketplace of idea" - it feels like society intentionally facilitates and encourages the use of a select few services.
And yes, when they get large enough to be de-facto infrastructure - like Facebook did - absolutely there should be a council of acceptable algorithms. We can't let for-profit companies decide the terms of discourse of society at large.