Idina signed when I saw See What I Wanna See at The Public, and again when I saw If/Then on Broadway, but If/Then was in previews, so maybe it became less frequent as the show went on.
I saw the RENT tour with Adam Pascal/Anthony Rapp on a few different stops and Adam never came out.
Lin is kind of sporadic at the Hamilton stage door. He didn't come out the night I was there, but he does come out.
I definitely don't begrudge the ones who don't (I was never promised an autograph or selfie with my ticket purchase), especially at the crazier stage doors. It must be overwhelming to have all these people pushing and screaming for you. Though I will say, I absolutely appreciate the ones who do come out and give up extra time when they could just go home. I know when it hits 5pm at my job, I'm OUTTA there. Mind you, I don't think anyone would clamor for my autograph, but still. I want to get home.