That's the problem with most of API apps of twitter. Twitter is a simple system. And if your are implementing a feature over Twitter via their api you are very

That's the problem with most of API apps of twitter. Twitter is a simple system. And if your are implementing a feature over Twitter via their api you are very vulnerable to this. Anytime twitter could implement this feature. Because you most probably have a user base of "small subset of Twitter's", you will have a great problem after all the users have access to this feature. This will make you the second competitor for the feature and move Twitter to leadership for it. So building features over somebody else's API is a bad move. You have to build a business which is not solely based over a nifty feature you have implemented over somebody's API which could be hijacked in no time. Implementing features are easy, building businesses are hard and time consuming.