I love that symbol. It’s basically saying “we want people to scroll down, the main content is down there. But we also will design the landing screen so that it’ll totally look like there’s nothing down there, but we still want people to scroll, but we also are going to confuse them with the landing, so let’s add this tiny icon so that maybe somebody will accidentally notice it and maybe will figure out what we tried to say and will have a chance to actually see the stuff that we want them to see in the first place, so we put it down there, and designed the landing to hide that fact”. Ah. Non-verbal communication at its best