Does the presence of inexperienced blackjack players at your table really decrease your chances of winning?

Which player would win more:

A player who plays a million hands of blackjack by the book at a table by himself

OR

A player who plays a million hands of blackjack by the book at a table with an inexperienced player who does not play by the book?

Assume an eight deck shoe that shuffles after six decks.

 
 

Does blackjack bonuses increase or decrease the house edge?

I play blackjack on occasion at a local casino and they offer a bonus. You make a bet from $1-$50 and if you get any combination of 20 they pay out.
2 queen of hearts=1000:1.
Same suit and card=19:1
Same suit different cards=9:1
Any 20=4:1

My question is this…..should I play the bonus and does the bonus increase or decrease the house edge?