A lot of the big streamers on Twitch have stifling contracts. Some allow you to simucast to other platforms, but when you are doing things like your bounties, you can't stream that to another platform. So you gotta shut down your stream on YouTube. Same with not allowing your reward chimes (like the default noises for bits, subs, etc) to play on other platforms (in some contracts), or have your Twitch chat feed with it's proprietary emotes appear on screen on other platforms, so rather than deal with a complicated filter/split cast a lot of them just do the old live on Twitch, upload VOD later to other platform. The rules are just convoluted, especially as it is not standardized across all contracts/partnerships. It's intentionally petty.
A lot of the big streamers on Twitch have stifling contracts. Some allow you to simucast to other platforms, but when you are doing things like your bounties, you can't stream that to another platform. So you gotta shut down your stream on YouTube. Same with not allowing your reward chimes (like the default noises for bits, subs, etc) to play on other platforms (in some contracts), or have your Twitch chat feed with it's proprietary emotes appear on screen on other platforms, so rather than deal with a complicated filter/split cast a lot of them just do the old live on Twitch, upload VOD later to other platform. The rules are just convoluted, especially as it is not standardized across all contracts/partnerships. It's intentionally petty.