Yes, there are tools to increase your number of Twitter followers. Yes, there are companies that will populate your Facebook fan page or will improve your LinkedIn activities. Some of these tools and services are fully automated. Some are purely a matter of outsourcing.
On Twitter, it’s perfectly possible to automatically follow people based on the content of their tweets. And your follower count will rapidly grow that way. However, it’s not about quantity, people.
There certainly are legitimate businesses that will build a community for you, content production included. Everyone does what he wants but the distinction between authenticity – a crucial element of social media marketing – and getting volume for the sake of volume sometimes gets really narrow.