Stars and upvotes

Quick question for the moderators: what exactly do all those various symbols next to users' names on the main page signify? For instance, I’ve noticed I have an asterisk next to mine, and I find myself wondering about the logic behind it. 😬

Well, it appears that both Tinchi and Shipka are sitting on a bit of an advantage here.

You only got that star because you hid yourself 😁, and those plus signs are just for people who are on your friend list.

I haven't touched any of my settings, aside from updating my avatar. I appreciate you clearing that up for me.