The only game around where I live is 6D and only allows one card after splitting aces and has fairly low penetration (3/4 maybe). You can still DAS and split up to a total of 4 hands. Is one card after splitting aces a common restriction? I imagine it isn't a huge deal since it is a rarity, but you lose the ability to hit and double down so I'm sure that gives the casino an extra few fractions of a percentage. Sorry for any ignorance I might display in this post, but I'm just getting into BJ and want to play more than the basic strategy. I've been using a basic hi-lo system at this game, but there are usually 7 players since it's so busy and with all the restrictions and 6-decks it has not been profitable.