"Fraunhofer, the major contributor to MP3, shut down its licensing program in April as MP3 patents expired — Red Hat has announced that Fedora will include official MP3 decoding and encoding. The reason is that MP3 is now patent free - as far as anyone can tell."

First linked (Engadget) article: "MP3 is dead, long live AAC. Its creators have abandoned licenses to the format, signing its death sentence."

Not clicking would have both saved you time and left you better informed.