"Tweet nearby" & "Encrypted tweet nearby" & "P2P Tweet": These three functions would blow the lid off active user growth. Across the globe Twitter remains a key means for promoting events, demonstrations and encouraging political action. Give users the means to reach by locale (Concert), and securely by locale (Flash mob), and P2P (Iran, Syria, China) -- and sit back and watch the audience skyrocket.
You are right to point this out. The United States has tried many times to use social media platforms to cause uprising in other nations. These very same nations (including the ones enumerated above) do cut off the services. Take the US installation of ZunZuneo in Cuba and the governments crackdown on personal phones in response - China's ban of Google for US influence and foreign surveillance - Russia's machinations against Facebook for influencing its audience - Kiev's ban of CSOs as Western organization through UNITER was revealed - North Korea's hacking of SONY in response to its partnership with the US State Department and CIA on The Interview - Israel's hatred over Jeremy Bird's participation in "OneVoice" political campaigning over Twitter - etc, etc.
Continuing to use US private companies as soft weapons will increasingly harm the reputations and global standing of these corporations. The military-industrial complex gig is up. Other nations know what's happening. It's merely a matter of denying the company access to a population while making it look not so bad from the PR side.
