Obviously several members did not watch the video. The idea is that these businesses pay Facebook a fee and Facebook will find users to like the business and then interact with that business. The problem is that this is not what happens. Businesses get the likes all right but they are from click farms. This is worse than worthless because posts made by that business only go out to a % of people who liked the business. If the majority of the likes are from a click farms then they will not get much interaction. So Facebook will not send that post to many more users. Get rid of the fake likes and a greater % of the users will like that post and so Facebook will send that post to more users.
These businesses are not paying some dodgy company for these fake likes, they are paying Facebook. This is all explained in the video.