"Socrates probably didn't draw a crowd": that's how I've seen this described. Meaning, the amount of people who see your content matters much less than who sees it.
Socrates didn't draw a crowd mostly because he was super annoying. Imagine going to the marketplace to buy food and then this short and ugly man with his two sidekicks shows up to start a dialectic about the nature of forms or something goofy, while you just want to get back home and start dinner...
Socrates' social circle were free Athenian citizens. They wouldn't have "gone to the marketplace to buy food", because food shopping was the task of slaves. Free Athenians went to the agora largely for socializing and hearing the latest news, so philosophical dialogues were less annoying and disruptive than you assume. It was certain of Socrates' ideas that got him into trouble, not his public philosophizing per se.
