Hi,
two month is an AGE in BTC. Two 8 weeks ago 1GH was making a profit for me about 0,06 BTC (AFAiR) per day. Now it's about little over 0,02 BTC...
And BTC was about 100$, now it's 75? Not sure, it's going down quite quick.
look at:
http://bitcoin.sipa.be/see that rising up red stepping line? it's difficulty - and green line - it's total hashing power. April it was 50TH/s now its over 200 I've seen - FOUR times more! I guess next step will be 0,015 BTc/1GHs/day so you will make 5ghs*,015*75= 5,625$ per day. Now it is about 8$/day (0,11BTC/day)
And remember to subtract power costs.
look at
http://50btc.com/they have a reward calculator - so you can easiliy estimate earnigs.
About USB sticks they are more expensive comparing to jalapeno - but i still think that there is a window to make a profit on them. Based on math as above and estimating increase of diff 20% every two weeks.
But don't blame me if you won't..
Best regards
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