just to add one more thing to this topic
i came across this new sportsbook, and it is the only one thats legal in the US
what they do is match up betters against other betters who are on the opposite side of the action
kind of like making a bet with your buddy, but doing it online against other bettors
this book matches up the bettors and takes a small percentage of the action, equivalent to less than the normal dime line
by doing it this way, they have slipped through US law on a technicality