I'm a customer, and I will say this, though their service is probably the best, you cannot ROI anymore. All those front page mining calculators do not take in the Difficulty increase over time, so they produce false results. You could go and try looking for a different solution really, just not SHA256. My opinion thought, your bitcoins and your choice in the end.
I didn't even know there were BTC profitability calculators WITHOUT the ability to project difficulty increases in your calculations. Most calculators have this and the "default" number is normally set between 20-30%.
Here's a proper one : https://bitcoinwisdom.com/bitcoin/calculator
I could be misunderstanding you so please correct me if Im wrong. You originally talked about bitcoin calculators produce false results because they dont take in to account difficulty increasing over time. You then posted a calculator that takes in to account difficulty increasing over time.
Yes. And?
quality response. respect.
I personally find this the best and simplest calculator: http://www.alloscomp.com/bitcoin/calculator
No settings, just type in your hashrate, and it will tell you how much you mine at current difficulty, and the estimated next. No calculating anymore.
to ascertain the true rise/fall in bitcoin difficulty, you don't need a calculator, you need a mind capable of prophesy.
There are so many factors which could make difficulty rise as well as fall. what if people realised that their 130nm rigs were no longer paying as much as they were costing - funny thing - it's time to switch off for lots of folks, but nobody does!?
what if the KnC datorhall fell through a crack in the earth (that would be nice)
what if?
what if?
what if?
ask me again in ~8 days and i'll give you as close an answer as I can to what the next difficulty change will be. That's the best anyone can do. get over it... move on... anyone running old 130nm rigs, and criticising PBMining that they won't make break-even are just as guilty of maintaining idiosyncrasies as those who don't understand - DON'T PAY OUT MORE THAN YOU CAN AFFORD TO LOSE - Cloud Hashing, or Mining Rig.