Because they are entertaining. This other streamers are entertaining for a competitive environment, not the day to day environment. Unfortunately there is no freedom to the competitive world of destiny (custom games). If there were a way for player to set up tournaments you would see larger numbers for those other streamers. Personally it's more like listening to the radio for me. I don't watch or listen to often, but when I do I can kind of follow along with what broman is doing just by listening. I'm completely lost when just listening to realkrafty. And that no fault of realkrafty, just the difference in streams.