There are a number of websites that engage in exchanging real followers. You can sign up and earn points by following others and then use those points to get real followers. Or, using the same types of websites, you can make the process much faster, by simply paying for real followers. Honestly, unless you are Kim Kardashian, Lady Gaga, Kevin Hart, Beiber or Paulina Rubio, you are going to have to use some unorthodox strategies to get followers. Just making good posts and providing good content and attempting to connect with others "MAY" get you a few hundred followers. Or, going that route may even possibly get you a thousand or so followers but after that, then what? Is it worth it to spend all of that time an energy to get so little followers?
there is no guarantee that those people follow you back whom you follow, the effective trick is that spent more and more time on social media and try to say something interesting and new.
Ask questions, post some valuable information and keep it simple. This way you will have more followers.
But most of business card do contain personal facebook more than business company . What you wish to put in your business card ? QR code of your business company fan page ? URL of your company business fan page ? I believe most people will look at your company main website more than facebook .