Some people buy followers. They pay a service that has a collection of fake accounts to bulk up their numbers. Then they think they are at the head of the line. However, it turns out that fake accounts never become real customers. They never pay for your service or product.
Other people steal already popular content from other people, post that in their own account, and use that to drive traffic. Their numbers go up and they think they are at the head of the line. But it turns out that people lured with someone else's content have no problem ignoring your own content. And they never pay for your product or service.
Thus you become the person who is at the head of the line, but who is never allowed to enter the building.