The benefit is not only that, many programs that offer the program once a member of twitter to gain dollars while doing activities tweet - tweet. One of them is RevTwt.
RevTwt Twitter is one of the publisher based PPC Ad Network we will be paid if you click the ads link from our RevTwt followers on Twitter. Well something like like adsense. The value of each click is relatively small when compared to Adsense, which is about 2.5 to 10 cents per-click. But the more followers you are, the more likely your ad is clicked and make money from twitter