As you can see my twitter account got more than 1000 followers, and all of them are real people interested in Survivalism, etc...
I've spent almost an year on the account, publishing once a day articles and facts on that theme.
So, what are you waiting for? Choose a product you want to validate or sell, buy one of my packages and see what's the response of that niche market.
I don't guarantee any return of investment since my followers are real people not controlled by myself :)