I watched Dreamworks Trolls and as I watched the movie I saw something surprising that makes me think that Dreamworks had asked Who Wants To Be A Millionaire for permission to use. When I watched Dreamworks Trolls I noticed that the troll characters refer to their best friends as their Plus 1's and I got surprised because Plus 1 is a lifeline on Who Wants To Be A Millionaire and it shocked me that there was a reference to Who Wants To Be A Millionaire in the movie
Bestie

Hi Bestie! I don't know, but you are probably right about that. "plus1" is something I only heard on Millionaire. They probably are trying subliminal advertising for the show. WOW! You are very good to catch it!
DTK