Twitch runs its own data centers and does not use AWS for the video streaming platform. There are probably some incidental expenses which are actually Amazon profits, but they’re much smaller than you’re making them out to be.
"Use the same live streaming technology and global infrastructure that powers Twitch."
Did IVS grow out of Twitch? Sure. That core is now a piece of AWS infra though, even though the team was initially built at Twitch.
(Obviously these things are weird to talk about in a vacuum, because all the pieces are 100% owned by the same parent. The splits we see can be changed with the wave of a CFOs pen, usually when they want to change how we view some overarching piece of the business.)
Not sure what they use for video streaming, and it might even depend on where you're watching from, but VODs are definitely on plain old S3 + Cloudfront.
