Okay, expanding... revenue currently based on broadcast value alone. No value is being extracted from communications loops, redirected communications, related content, drill downs, prioritized versions of the aforementioned items, filters (including location-based filters) or monetized karma (eg. Reddit gold). All of these can be accomplished without polluting the UI or purity of the tweet. Additionally, the highest value network members have got to be cultivated, incentivized for tweets, interaction with other network members and tolerating the occasional flame. A mesh networked solution should be in the works with a moderation-bridged pipeline to the conventional twitterverse.