I've had the solution to this for like twenty years. I don't have the time or inclination to do it.

Automate MLM (Multi-Level Marketing), six or more levels deep.

"Affiliate Program" six or more levels (degrees of separation) to make a word-of-mouth network that rewards people for making connections between sellers and customers. Public all the data. Self-reinforcing, self-stabilizing.

I have no idea why no one has done this before. To me it is blindingly obvious.

You could start tomorrow and eat Amazon's lunch within the year. Do it right and nothing could stop you, no one could even begin to compete thanks to Metcalfe's law. (In other words, if someone could do a better job than you the correct thing to do would be to quit and join their network. In other words, there is a strange attractor that results in automatic partition healing.)

Blah blah blah yadda yadda waves hands

I'll leave the details as the proverbial "exercise for the reader".