You're also aware that Twitter could at anytime disallow your use of their entire API ecosystem, correct?

237 of the Fortune 500 is a powerful reality distortion field. I've been right (Zynga) and wrong (Facebook) before, the future is notoriously hard to predict. The fact that anyone perceives any long term value to software with banner features like "scheduled tweets" is supremely irritating. By the time this slew of darling me-too software startups are ashes, the early stage investors will have already extracted their return. In the end, I suppose that is all that matters. What is most irksome is that HootSuite is effectively crippled because Twitter terms of service will not permit them to develop features that are in incredibly useful, and they will sue companies that do (TweetAdder). HootSuites entire business is predicated on an amicable relationship with Twitter, but if the business delivers features that are truly valuable, how do they prevent Twitter from commoditizing them within Twitters native feature set? This strategy is incredibly naive, and it's destined to fail.