Bought 38 more mh/s

Now have total of 48 mh/s

Hope it will be worth it
the last payment was around $ 0.72 per MH/s. You may never recover the investment, the difficulty keeps increasing so rapidly.
Unfortunately you might be right. Here is the updated chart of my returns in mBTC per mH/s since I started with GM on May 10th:
http://i.imgur.com/sUVTSb2.jpgHere is the same data in context with previous returns since February (derived from payments made to other users and publicly available on the blockchain):
http://i.imgur.com/qbMAlQd.jpgCould the trend reverse in time to get a positive ROI? I suppose, but there are going to be a lot of new ASICS coming on stream this year. At the moment my best guess from extrapolating the trend shows the ROI about minus thirty percent by contract expiry. If somebody can put a positive spin on the data I would love to hear from you!