engage people, engage other artists. you dont even have to use it as a social platform, but you do have to participate in whats going on. do you know the hashtags, the events, the people? upload regularly, upload stuff people want to see, but first the foundation followers have to exist. retweets are king, likes are almost useless except as a measure of who is looking at your stuff and when, retweets are how you get new followers and exposure, so ask yourself, how do you get retweets?
Template88
its 100% just you. your art is marketable enough, but you do have to strategize, not just posting blindly to nobody forever.
Rennis5
Interesting comment, do you have any strategy advice?