Well one person has an idea of why 50 Cent has been using his twitter account so much, G-Unit's own DJ Whoo Kid. 50's DJ says that the G-Unit leader got a new phone, making it easier to use twitter and since he simply has been going nuts.
"I think he got the new iPhone and they put the [Twitter] app on there. And then Yayo was talking about 'go on' and he just started wildin' out. Once he saw how easy it was, that was it. Because before, he had a Blackberry, he didn't really care too much about going online. Whatever he needed to promote, he had somebody promoting it. But now he has it in the palm of his hands, and he's going bezerk. He cursed me out on there like twice. I'm like a f*cking human punching bag on Twitter. But it's all good because the more they curse me out, the more followers I get…This is like a nightmare now that he has 3 million followers, and I'm assuming he's trying to break the 5 million follower capacity. But making him mad and he has Twitter is a nightmare , so I would suggest not to go at him too tough. Leave him alone. Because basically whatever he says on Twitter, everybody knows."
50 Cent – Talks Using Twitter For Fun