I think that when people post pics of their animals, they just want to show off their animals and tend to forget or not even thinking of posting who the breeder was. Personally, I don't really think about "who" I got a herp from. Although, I do remember where each and every one of my animals comes from. If someone is interested in knowing who produced an animal I've posted a pic of, they can just ask me.
It's not about being "big man on campus" it's just about showing off the animals, not name dropping, not rubbing shoulders, not my stock is Mr. Big Name.
Besides, maybe the breeder doesn't want their name plastered all over the place, for whatever odd reason.