The relationship between Twitter and outside developers who build their applications is a bit like sharks and small fish that are latched  in the back – good for both, until it is not.

Recently, he took the murky waters. The Federal Trade Commission is investigating the relationship between the Twitter and its developers. Twitter, and the developers refused to comment on this issue. Meanwhile, the apps built by third-party developers have become a flourishing corner of the tech industry.

Over the last six months, investors poured $ 500 million for application developers of Twitter, while companies such as Salesforce.com and Wal-Mart to pay $ 1 billion to buy start-ups. Depending on the application Twitter said that 750,000 developers have built more than 1 million applications.

 The sharp increase in requests for apps, raises the between Twitter and the developers  about whether they are partners or competitors.

When Twitter was launched, the service was bare-bones. The company has encouraged developers to create applications for publication of photos and using Twitter on smartphones.