What's the best way for developers communicate with their customer?

What happens when vendors have some information that's vital to deliver to the customer base? Facebook? E-mail? Rogue Amoeba, the maker of a number of popular Macintosh audio utilities talks up its new in-application programming interface for sending important news directly to users.

Source: http://www.zdnet.com/whats-the-best-way-for-developers-communicate-with-their-customer-7000000931/

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