I strongly advise against playing any casino games on the net ( except in free/fun mode ). You are playing against s/w, not a randomly shuffled deck of cards ( barring cheats ).
Where did they get the 2% figure? Basic strat should result in about a .5% deficit at single deck games. They programmatically shuffle after every hand, to keep counters from playing against them. What's to prevent them from rigging the s/w? NOTHING! vegas has a gambling board and licenses to hold over their head, these places have ZERO enforcement. There have already been credible reports that craps was rigged against right bettors on some s/w. A player kept beating the sites using it by playing wrong, not by cheating, and then they wouldn't pay him.
Betting sports at these places is dodgy enough, but playing against rig-able s/w is suicide, IMO!:nono: