Stop giving streamers special treatment. Their "service" streams are exactly what you list as "cheating".
They make money off of passively selling their carries 24/7 by gaining followers, paid subscribers as entry points for their raffles and viewership which equals money. That IS boosting.
Stop letting them get away with it. Also they are non stop recoving other peoples accounts still for videos because you put that exception into your biased rules to allow people explicitly to use other peoples accounts for "weapon testing".
Catering everything to the 0.1 % elitist population is getting so old.
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Boosting has been considered cheating in many competitive games, and even multiplayer games in general. Carrying involves playing WITH a better player, boosting is a better player playing FOR you.