I think the issue is there’s no reliable reputation system on the internet.

I remember when Facebook launched I thought it might serve as this (eg, “oh h2odragon has a year old account and seems not like a psycho, I’ll let them come to my art class”). But Facebook wasn’t interested and stopped providing apis and whatnot. I think it didn’t align with their business model as they kind of want scams as it drives lots of revenue (in that a significant portion of ads are misleading or scams that would be devastated if people could post reputation info like “this magic mouthguard doesn’t work and just a $10 drugstore version wrapped in $40 of social media ads”).