Why it needs an access to "manage my contacts"?

Compared to early crazy years of Facebook apps, there has recently been a pleasant trend of apps asking just a minimum needed access rights and gradually asking for more if it needs. Now that all major platforms (Facebook, Google, Twitter, iOS) offer a pretty good way to display access rights - I think Facebook's way of showing them is the most clear of the pack - access right management seems a natural part of the application signup flow and not a chore.