Chase the low draw?

[chaos]

I think of it this way:

The pot has 16.5 BB and you win half or 8.25BB. You put in .5 BB on the flop, 1 BB on the turn, and 2 BB on the river for a total of 3.5 BB. So in your half of the pot your profit is 4.75 BB.

While you were drawing you put in 1.5 BB to win 4.75 BB. So you got just over 3 to 1. This assumes you never get quartered or worse. So you odds are actually less. The odds of making a backdoor low are higher than the odds the pot is laying you so drawing to a backdoor low loses money.