[ric2b]

Ebay or Visa could easily be a moderators on the platform.

And they would be safer than they currently are, currently they can theoretically run away with your money and your best hope is to sue them.

[xapata]

How do they get paid? I didn't see that in the FAQ. Presumably they take a cut from the seller? If so, I'd imagine it might be frustrating to negotiate which 3rd party you pick for what fee for each transaction.

[ric2b]

Perhaps, but is it that different from sellers selling only on some specific websites/stores and not the ones you want to buy from?

[xapata]

That's my point. I don't see how this would materially improve my experience. I've picked my trusted intermediaries and I shop through them.