@sozobe,
Of course you're right that she is sending signals, and you are also right that by doing so she is attracting media attention. Whether or not the latter is the reason for the former is something neither of us knows. I suspect that, in part, it is and I find it tiring, however you included her being
relevant in the equation.
My point is that she doesn't need to run for president to remain relevant. Proof of this will be the efforts made to secure or learn of her endorsement if and when she flatly takes herself out of the running. I understand that you do not think highly of her, but that's pretty meaningless when it comes to whether or not she is politically relevant.
Might her opinions be considered more relevant if she was running? Sure, but the fact that she has relevance without running is, I think, what will eventually lead to her not entering the race. Sometimes being a king-maker can be better than being the king.
I think that if Rick Perry flames out (entirely possible) and Chris Christie doesn't enter the race, there's a fair chance she will give it a go. If she does, I certainly can't predict the outcome.
I would caution you to not be so certain she has no chance of winning the presidency. I thought the same about Obama, in part because I thought he had no chance of winning the nomination, and I was certainly wrong. This is not to suggest that it is amazing in any way that I might have been wrong, but I wasn't alone in my estimation. I doubt Hillary thought he had any chance at first either.