I find them to be just barely-masqueraded attention seeking.
A friend of mine and my wife does that all the time - posts a picture with a nice view of her rump with the caption "My mistakes don't define me, my leaning does" and so on. She has also this odd habit of sending you a (clothes) selfie when she blasts out the good morning texts.
I make fun of her with my wife sometimes, she says I'm an hypocrite because I too post the occasional abs picture (read occasional, one every 100 posts of my feed) and I'm being a bit too judgmental.
I just make good-hearted fun of this person more than judging her, she's a nice girl overall but I can't help but note that her profile description says she wants to "awake the mind", when her selfies obviously awake something else from the guys that follow her.
The irony...