Is your investment amount in BTC? If so, is 1 BTC invested with ROI of 2.95%, a profit of 2.95% in total? The amount of days, is that how long it took you to get ROI? How profitable are these contracts...I was thinking of starting one.
Have you ever just purchased a miner on hashnest instead? I really want to try mining again, but am super weary of not breaking even.