Besides these 'obvious' bots, there are more that have humans in control, but which the humans never read tweets, they just post them. I would bet, though have

Besides these 'obvious' bots, there are more that have humans in control, but which the humans never read tweets, they just post them. I would bet, though have no data, that there is a large percentage of these 'post-only' accounts. Not sure if they should be called bots or not...