We've used a mixture of cold emailing and social media to generate growth in the past. The trick with social media is figuring out how to make your content both engaging and relevant to your product.

We're experimenting with Instagram stories on our latest project: JQBX (https://www.instagram.com/jqbx.fm https://www.jqbx.fm). Having good content lets you get more eyeballs on your stories which, so far for us at least, haven't driven people to unfollow since the feed content is of a high quality.