Remember that this data covers slightly more than two years of payouts. So under my (admittedly low-information) assumptions, streamer #400 gets 750k in revenue annually.

Also, you linked to the wrong job title. I said "senior staff" software engineer, which where I work is two rungs above senior engineer. http://levels.fyi has comp estimates for a bunch of the big tech cos. $750k far from an unreasonable amount for someone to make in this line of work, and plenty of folks make a lot more than that.