I don't particularly care for Bo, but am hoping for Carrie to win. How do we know that they don't boot out whoever they want. AI could cheat the viewers and we would never know.
If I'm not mistaken, I think AI has some kind of high-falutin firm overlooking the votes, making sure everything is on the level (the same way Price-Waterhouse handles the Academy Awards). If it was ever discovered that AI was rigging votes, they would probably be sued into the ground.