Organic development is best. Buying followers can often buy you trouble from India, Indonesia, Malaysia, Korea, Russia and deadbeat trolls...
Make your social media accounts as interesting as you can. Actually log in and interact with people instead of just spamming links. It works to engage the community you are working with.
I respect Damian Jennings tenacious efforts to come off like an asshat by attacking people sideways, creating controversy where there is none and for going outdoors without a chin.