The news of the day in social media land: Twitter is apparently going to start experimenting with paid premium accounts through its Japanese subsidiary ( Twicco ), which has always been a bit separated from the rest of Twitter and in many ways a playground for the company (e.g. Groups , Twitvideo.jp ). Details are sketchy at this point, but Japanese media are reporting that Twitter is going to introduce a tiered payment model and aims to charge people to view tweets from certain premium Twitter accounts.