So LG made a deal with Amazon to sell the G6+ at a heck of a price (with Amazon advertisement of course) but even the unlocked version is around $700.  
LG is trying to make a little bit of noise for the holidays, I understand.  Alot of people shop on Amazon and not everyone wants to burn through their holiday budget on many of the $1000 phones.  The G6+ is a very good alternative.  
I hope we don't have to wait until post-launch of the G7 (March-April) to see Oreo on the G6.  And if we did, I wouldn't be surprised.