Some users prefer not to fill out their profile, so that space is blank.
Where do I look to see someone's profile? Maybe I'm missing something but I click on an avatar and all I get is their activity, not their profile.
It's meant to be at the top of the page in the margin on the right, but sometimes you have to scroll down and it is still in the margin, but it lines up with the end of the user's activity, not at the top of the page. I think it's just a glitch, because it does that sometimes to me.