[Leptyne]

You should expect a return of 10X your pre-flop call. In your example this means 50BB or $100. This makes up for those times you don't hit, or hit and lose, fold at the turn, etc.

The odds of flopping a draw are 8.1 and 8.5 for flush and oesd. then you're a 2-1 dog to hit, and may not win if you hit.

With pp you want to play HU v. an opponent that has a stack big enough to pay you off. With sc you want a multi-way pot because you only playing for a draw when you hit the flop.

Profitability depends on how well you can extract value from an opponent those times he has a good 2nd best hand.