Sure - no one thinks Twitter (or anyone) knows the exact count for real users, etc. But fraudulent activity and bot development is also driven by the underlying

Sure - no one thinks Twitter (or anyone) knows the exact count for real users, etc. But fraudulent activity and bot development is also driven by the underlying success of the website (scammers don't scam where there's no one to scam) so there's reason to pay attention to relative changes (or lack of change) in overall patterns.