Ross directly profited from the sale of those drugs. So, yes, he was "selling the drugs".
Comparing Meta and Google to Silk Road is a bad faith argument. You might as well compare Silk Road to the phone network at that point.
https://en.wikipedia.org/wiki/Silk_Road_(marketplace). wikipedia uses as reference https://web.archive.org/web/20160407165324/http://gawker.com... and https://web.archive.org/web/20131012012106/http://www.thegua...
plus, at least ebay, amazon, big tech comply or at least sometimes comply with the law banning some products which can't be sold or advertised