Isn't live streaming with chat cheating?

I've seen several chess personalities streaming their games which I enjoy. However occasionally someone in their chat will suggest a move or warn them about something. Wouldn't this be considered cheating? I've also seen one (and I'm not sure if it was on chess.com) where a very well known top level player took over for a lesser skilled player mid game and won for them. Is that not also cheating? These are all things that are public yet it doesn't seem like they get any punishments for it. 

Usually the streamer will ask their mods to ban anyone in their chat who suggest moves, lines or direct hints. Also the streamer should ideally not look at their chat until the game ends. But if they do look at moves in their chat & that influences their game, then yes, that ought to be cheating but I'm not how exactly chess dot com can tackle this though, apart from their usual anticheat measures, they can't monitor all streamers and their chat. What they do instead is during prize money tournaments like Titled Tuesday they ask the participants to turn off their chat during game or provide a live feed of their computer screens which chess dot com can monitor so the players don't open chat or engines. The famous streamer who took over from his much weaker wife mid-game to win the games is Levy... He actually does that as a series... I think he said he's got 'special permission' from chess dot com to do this, also notifies the opponent that he'll step in mid game and any rating points won or lost are reset by chess dot com. Levy & Hikaru are HUGE promoters of chess dot com's social reach so they get all sorts of privileges that the rest of don't get. If I'm not wrong, they have direct hotline to the Fair Play team inside chess dot com. Levy even has a video series where he detects, trolls and then reports cheaters to chess dot com, who instantly ban them.

https://support.chess.com/article/1344-are-streamers-cheating-when-they-get-suggestions-from-viewers