It wasn’t that long ago that Twitter was just another tech start-up with a modest user base and uncertain prospects for revenue (let alone profitability). But the micro-blogging service has seen explosive growth over the past few years, and a multi-billion dollar IPO is now inevitable.The founders and early investors aren’t the only ones who have made money off of Twitter; countless individuals and businesses have harnessed the power of social media to create new revenue opportunit… Continue Reading