social media sharing of relatively inexpensive ads has a multiplying effect
Those who argue that $100K for ads on facebook is nothing and so fake accounts on facebook had no real influence don't understand how social media works. Ads on facebook are a spark, rabid followers liking and sharing are the fire. But the influence is still happening. Fake accounts are currently influencing the opinions of Americans and they don't even realize it. Even Trump re-tweeted a Russian account posing as a pro-Trump Republican.
Trump personally thanked fake Twitter account linked to Russia