So, here’s a proposal to radically change the economics of Twitter: Charge businesses that exceed a set number of followers (perhaps 250,000) a monthly fee based on their total number of followers. To provide a sense of scale, here are the follower counts for a cross-section of well-known brands:

@TeslaMotors 1.4 million
@Verizon 1.7 million
@Pepsi 3.1 million
@CocaCola 3.4 million
@McDonalds 3.4 million
@Intel 4.7 million
@Marvel 4.9 million
@GoogleChrome 6.1million
@SamsungMobile 12.1 million
@Google 17.6 million

Source: How to make Twitter profitable | TechCrunch