Oh, that's not good. He's been busy I guess. He's kinda breaking out and being in many interviews lately. And I hope that's the only reason.
Thing is, for me it would be my 4th time since he hasn't answered. I just felt like I'm being pushy and intrusive at the 3rd time let alone 4th.
The oddest part about it is he used to talk with me all the time. I would send him stuff too that he'd use for his research or for his newsletters.