Twitter is considering adding subscription fees as the company looks at diversifying its income streams. “Increasing revenue durability is our top company objective. You will see us continue to research and experiment with ways to further diversify our revenue beyond ads in 2021 and beyond,” Bruce Falck, revenue product lead at Twitter, said in a statement to news outlets. “These may include subscriptions and other approaches that will give people and businesses of all sizes on Twitter access to unique features and enhanced opportunities for content creation, discovery, and engagement,” he added. “While we’re excited about this potential, it’s important to note we are still in very early exploration and we do not expect any meaningful revenue attributable to these opportunities in 2021. Given the massive opportunity to build upon our strengths, our main focus continues to be on growing our ads business.” Twitter didn’t immediately respond to a request …