care to elaborate why ?
What do you mean?
http://www.alloscomp.com/bitcoin/calculatorThis estimates that at 4.5 GH, 19339258.2724 difficulty and $108.55 USD/BTC, the jalapeno will generate 3.56 BTC/month or $386 in month 1. Even at 10x difficulty, that's $38.6 per month.
another, more extensive calculator,
http://www.bitcoinx.com/profit/This one reports 0.13 BTC/day.
i haven't a clue what the final power numbers are for the jalapeno, but if it draws 100w and electricity is $.15/kwh, then what, power will cost a whole 36 cents per day? Not too bad... so yes, even if difficulty goes up by 10x, i'll be well past paid back for the unit and will bring in $35+/month...
A jalapeno produces a minimum of 5 G/H (via two chips rather than 4.5 G/H from one as initially planned) and uses 30w, 5w per G/H is the current BFL chip power draw. They may improve slightly in the future.