>>2478291If you want the most likely reason, since it's happening to everyone, not just Vtubers, here's the two most reasonable answers based on how YouTube/Google acts:
>the code is breaking down because it's barely maintained by their third world staffers and the algorithm that they've fucked with so often to make it produce "nice" results has actually gotten away from them, to the point where no human alive actually fully understands it anymore, but they're too deep into the architecture of it to back out nowOR
>Google also runs AdSense, and desperately wants every scrap of revenue generated kept in-house, so they let dubious quality accounts watch videos for long enough to generate ad-rolls (meaning they can charge higher premiums to advertisers for higher recorded metrics on the AdSense side of the company), then purge them from the YouTube rolls as "spam viewers," meaning they don't have to pay out the full amount of money they would owe the content producer under the guise of preventing bad faith botters from cheating them out of moneyNeither option is good, but it's far more likely than most alternatives.