The percentage of fake users has a high correlation with the value of the business. Twitter's value is higher if the number is lower. I'm not suggesting they just started bullshitting in the past month, just that they are not making the best effort to get an accurate number.
Having zero bots would be good, but obviously that isn't True. So instead they say a low consistent number and hope no one proves them wrong. Most importantly it doesn't appear to be getting worse.
