I completely understand why they do it, but nearly every big pro streamer you see has their map covered. I feel like studying the minimap in a high elo lobby is one of the best ways to learn more about positioning and playing off of your teammates' positions. Sure I could watch pro matches to look at maps positioning, but half of the stuff there doesn't apply ranked, and let's face it, 99.9% of us are never gonna play in that setting. High elo ranked is definitely one of the best way for most of us to learn stuff. There really is no other option other than stream delay, but that just hurts viewer/chat interaction for the streamer. Probably a small nitpick overall, but I just wanted to get that off my chest.