Something must be up with Josh, maybe he was fired? Because it seems every time someone asks about him Tony just "ignores" the question :P
No news is no news. Either Tony knows something, or he doesn't. If he knows something, he isn't going to talk about it because he doesn't want to say something that reflects poorly on Amazon. If he doesn't know what's going on, admitting that fact would open the door for even more speculation in a vacuum, which also doesn't do the Amazon brand any good.
Tony is being the Good Corporate Guy by ignoring the elephant in the room. Sucks for us, but perfectly understandable from his perspective.