My issue is that I should be getting around 0.9 ZEC per day. But if you look a the above link, especially the payments section, I am getting less than 0.9 ZEC per day since 2017-12-14. As payout usually happen in 30+ hours
I hate to burst your bubble, but 0.9 ZEC/day is not a reasonable expectation for a single card, not by a long shot. In fact, you’d need around 7-9 1080Ti’s running in order to get 0.09 ZEC/day at this point, an order of magnitude less than you’re interested in.im not sure how you did your calculations, but for a reasonable expectation of earnings,you can look at whattomine. Best of luck moving forward!
I’m not sure where you’ve read that you should be getting 0.9 ZEC per day, but you are wrong. Your single 1080 is working at about 528 sol/s on average - and to get 1 ZEC per day you would need about 65,000 sol/s - or about 125 of the 1080 cards.
One ZEC at the time of writing is about $475 - so based on your initial post, you thought you’d be earning about $430 USD per day from your investment of $600 USD… This is not the case.
But if you assume that ZEC stays around $475 and the difficulty does change for the next 12 months, then you could earn about 0.29 ZEC per month - or about $147 USD.