Actually it's 49 - 51 isnt it?
51-49=2
Hmm interesting , i never thought of this, i always calculated it with 49-51.
Ok then, so it's 49.5% win, 49.5% loss, and 1% house comission.
Now what does that tell you, it means that the win and loss will be equal in the long run, and its the 1% that drains away your money.
If it were 50-50, you would probably end up breakeven in infinity.
So what we need to analyze is the 1% house edge how much that drains us and what are our expected chances of beating that short term.