It deems accounts as bots if they post and retweet a lot and are newly created? Being familiar with the Yang Gang, people are extremely passionate almost to an addiction of supporting Yang. They follow his every move, his surrogates words, and engage with any tiny bit of content they can. Many are new accounts because few have ever followed politics and want to keep separate from their main accounts.

Yang has one of the strongest audit scores with 95% of followers being real. Contrasted with Bernie Sanders at only 69%. https://www.twitteraudit.com/andrewyang | https://www.twitteraudit.com/berniesanders

While there may be a few bad actors, it is definitely not representative of those that engage with Yang and his campaign. It shows up on the ground as well where Yang's following shows up in biggest numbers.

At least in Iowa, there were hundreds and hundreds of volunteers that flew in to canvass in the snow, outnumbering most campaign ground forces. In San Francisco, weekly hangouts have been growing to 30 people, and volunteer events turn out 15+ people regularly. I believe this is nationwide as well, there aren't many campaigns that have been matching the grassroots volunteer forces.