If you were to join twitter for the purpose of campaigning, I imagine you'd have a lot of bot like behavior. Activities the author describes as bot-like to me seem like activities a noob on twitter would engage in.
Twitter itself does a lot to self-create these node clusters, with a circle jerk of recommended followers based on your activity. If you have a bunch of twitter noobs, all liking and retweeting Yang and his surrogates, they will inevitably get clustered together via twitter's own algorithms.
I think it's a mistake to assume that politically disengaged folks who would like to stay anonymous online, and are only joining a social media platform to promote their candidate or two, would behave like "real" users.
I say this as someone who converted an old twitter account from 2011 I used when I was a teenager for spam purposes, to become a Yang account. I'm sure I'm considered a bot by the author's software.