It's its own twitch category.
First streamers did 24h streams which is a reasonable amount to stay awake and boosts donations because it's an event.
Nowadays they are more likely to do subathons,
give 3$ to me and 2$ to jeff bezos and the stream continues for x amount of minutes while x usually varies between 1 and 10 depending on the viewer base and how greedy i am.
This boosts incomes but also can make the total time of the event unreasonable long therefore the i'm just sleeping category was born.
Never heard of anyone having it their main focus, but why not
'sup mate?
next ruond on mi!