Check out the influence of social media. WOW! Now that doesn't mean we can't use social media effectively to get emails or to engage folks. It just means that it isn't turning into $$. And I hate to say it, but I've been saying this for a long while. My clients just aren't getting a bunch of action from social. (Unless you count YouTube).
Add to that study, this study by Pew Research. Tablet and smart phone users, are using these devices primarily to send and receive emails. Go figure. Not text, not games, not social media.
Want more business? Develop your email list. Send out emails monthly or more often depending on your business. Refine your email to make certain you are speaking to your followers and sharing things they want to know and deals that will drive them in.