The Haber Process[1] was a new way to manufacture ammonia in large quantities. Fritz Haber was originally motivated by Germany's war objectives to kill people via poison gas and explosives. Germany needed a lot of synthetic ammonia to do that.
Now, the Haber process is mass producing fertilizer and feeding the world.
It's possible to divorce the original evil uses of the technology from the later good ones.
The potential 200 million ebay and whatever millions of amazonmarketplace legal sellers can outnumber the criminals. The 10% ebay fees and 15% amazon commissions are very compelling motivators to create an "open SMTP" type of marketplace for sellers.