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DMKano said:OP - what you need to understand is that a SINGLE twitch "super streamer" with millions of followers can change that chart and push any game into top 10 spot.
This is why the most popular twitch streamers are bought and paid by game companies to basically advertise their games for $$$. Top streams all have a time-slots you can buy where they will play a specific game for money - which will push it into top 5 twitch usually - and the "prime time slots" are crazy expensive - can be over $10K per hour.
So if you really want a realistic chart - you have to go into each game and see if they have a single streamer that has like 30K viewers, then subtract that from total.
In your example - Runescape had one streamer that had 4K viewers - so that was one guy who put it up there.