I think there are bots to watch youtube and twitch to boost the viewership. I think that could consume a lot of traffic. I have no data or research to back that up and I am no expert.
I have no idea either, but most mobile/residential proxy providers heavily charge bandwidth [1]. I'd imagine that you can bot views on twitch without streaming the video, since the iOS twitch app offers audio-/chat-only modes, so just connecting to the chat (+ mb some other obfuscated stuff) could be sufficient to bot views.
[1] $9.45/GB at brightdata.com/proxy-types/residential-proxies
