I think about a week, maybe ten days of this trend was Free FM ( sheesh, what a horrible name...as opposed to, what, FM that you have to *pay* for? "Free Radio" would at least make some logical sense as the name ).
And, in a case like this, when you go from playing music to not playing music - yeah, you'll see it. Everybody goes buh-bye.
When you don't do any outside promotion of the change, you just ensure that the people who might want what you're doing don't know about it so all you manage to do is run off the existing cume.
Which, maybe is what they want to do...then tweek it and get it "ready" and once they feel it's there, then and only then start promoting it.
But, it's Infinity, so...I would figure that, save for the addition of Carolla first of the year, what we see and hear is the whole shootin' match.