some idiot who is looking to make money by selling random useless data he finds on the blockchain after adding some imaginary stuff on top of it saying X amount of Y moved to exchange Z.
if i am not mistaken it started during the time when drama about MtGox selling bitcoin and being the reason why price dropped from $20k was the heated but stupid argument on the internet. and people wanted to know when these "whales" move their coins to sell so they could panic sell before them