Steemit has changed lives. I'm not just saying this in a cliche but I have actually seen steemit changing lives of people that I know, and from other countries as well. There are a lot of Nigerians on Steemit so with what I am guessing, it's already quite famous there? But still there's always a chance for more. Maybe you could take that step and promote steemit through pamphlets, social media etc