Gotta say, It sure feels like Twitch is doing their level best to waste random gift subs. At least a half dozen I've received in the last few months have occurred when I wasn't watching the channel, in fact this one just popped several days after I *unfollowed* the channel when the guy was snippy with me for no reason. Some of them have been dispensed literally the moment I tuned in to a channel I ultimately found no interest in.
I only do subs for Subtember since Amazon doesn't take their cut.