The article is missing some very important points. How effective are these disinformation campaigns? Are they effective enough to, for example, significantly

The article is missing some very important points. How effective are these disinformation campaigns? Are they effective enough to, for example, significantly impact an election or sway enough people’s opinions about a vaccine to affect it’s adoption? Where is the evidence? Also, how is a bot able to avoid detection? Seems like it would be easy to see that a single userbot “liked” more than is humanly possible ... even if the bot were written to mimic normal humans, then it would require more bots, all presumably coming from a similar cluster of ip addresses, making it more easy to detect. Of course, what incentive do the social media platforms have to detect fake users (especially active ones like bots), since their metrics are largely driven by that metric?