Twitter has a huge problem with bots. On one hand, there are a lot of bots which are more or less malicious, e.g. trying to cause political strife or promote s

Twitter has a huge problem with bots. On one hand, there are a lot of bots which are more or less malicious, e.g. trying to cause political strife or promote scams. On the other hand, Twitter sells advertisers on the idea that they have however many millions of users. So if Twitter was to actually get rid of the bots, then they would cause advertising revenue to drop, which might actually kill the company. So they are stuck with algorithmic techniques which walk a fine line of accuracy. The solution is probably to mass verify real users (though "real name" verification is problematic). Right now, they use verification as a way to play favorites. Real users with hundreds of thousands of followers can't get verified.