There ain’t no shame in asking, and you never know what people will do for you until you ask. Feel free to post occasionally on one site reminding people you have a presence on other platforms as well. It might sound like something they already know, and chances are they do…but that’s if they’ve even thought about it.
There are plenty of people I follow on one channel, be they friends, musicians, or otherwise, and for one reason or another, I’ve simply never considered looking for them on other popular websites, even though they are sure to be there as well.
Tweet messages asking your fan base to connect with you on Facebook, Instagram, Pinterest, Snapchat, and so on. Whatever you have, get the word out you’re posting, and you’d love for your fans to join you there. Not everybody will go out of their way to find you on every app, and that’s ok. You will hit superfans several times a day in several different places, and if you continue to promote the other sites, you may see your total reach grow over time.
Keep in mind though this can come across as a beg for followers, so you need to go about this with some tact. Only ask every once in awhile, and try to come up with a way to do so that’s fun and still entertaining. If your profiles become you doing nothing but selling and trying to raise your numbers, you’ll actually start losing fans and followers.