if this works like any other twitch event then you can simply tune into a sponsored twitcher mute the volume switch to a different tab and once an hour check back to see if they are still streaming if so click away again and do something else for another hour if not then tune into the next sponsored twitcher and repeat until you've got all 6 hours racked up, this is how i've done all my twitch events i cant stand twitch i dont know how anyone can find joy in watching others play games