blackjack xchange must be new, if u get dealt for example an ace and a 4. you can buy another card to replace the 4. and it works out alot in the players favor in the long run. im doing great betting sports but good with blackjack to. up 150 blackjack and 50 on sports today. +3800 for the last 5-6 weeks. and 95 % of my wagers are unders in nfl and nba.