Social casino sites work best when linked up with Facebook and other social media accounts, allowing you to compete and compare scores with your friends and family. This is a rapidly expanding industry, as slots and table game enthusiasts discover the fun of playing games just for their entertainment value. One of the main reasons is the sheer amount of choice you’ll find yourself faced with, once you start looking out for a social casino site to sign up to. So why on earth would a social casino give away an introductory bonus? You’ll get all the thrills and spills of watching your social casino account balance rise and fall, but since real dollars aren’t involved, there’s no financial risk either. The big attraction of playing online games at US social casinos is the fact that you’ll only ever be using pretend money.