Are you on FB?
If so, how often do you tell your list members you'll give them a bonus if they follow/connect with you on social media?
has some rather interesting ideas, like:
"Trick #1: Blast emails to your list. -- Instead of asking your friends to follow you on Snapchat, send emails to your list and let them know the benefits they are going to receive when they add you on "Snapchat". REMEMEBER: The more reasons you give your followers, the higher your chances to get them to follow you on Snapchat."
But the point remains - try to get your name out wherever your customers might be.