That is right there entire catalog is now free to download. Apparently they're making the change to attempt to make revenue via streaming, and other services rather than charging outright for the music. Regardless their collection is pretty nice with many artists I'm personally a fan of so I'm definitely taking advantage of this.
Music is still royalty-free, but obviously you must do a few minor things in return. More licensing details can be found under your account page, but you're free to use it on Youtube, Twitch and Beam.
Their site: https://www.ninety9lives.com