On this match between Miracle and w33, Miracle (on the dire side) placed his wards on his side of the mid, center atop the ledge. (2:02 minutes into the vid)
I noticed other high level mid players do this too. Why is that?
I understand he did this so that he could see w33's side of the mid lane, but there are better places to put that ward. For example, at the upper left side of the radiant side. In this way, you can also see the top rune and watch out for ganks, while having vision of the mid lane.
Why is the Red X a good Placement for wards nowadays?