When he mentioned marketplace the thing that came into my mind is exchange. I thought I'm gonna see binance on the list, so meaning marketplace mentioned is where you can purchase tokens or products that accept crypto tokens too.
Is these marketplace are well known to be honest never heard of it aside from Origin Protocol which come to my mind since Ive read of them before.
Well it is the first thing that also came into my mind I though about crypto exchange.
But I think this kind of marketplace should be promoted I hope that there would be something like Amazon that accepts crypto,
But we should be aware if something like that exist always watch your wife if she would buy something from your account

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