It was only paid off if you sold at the right time and nothing had gone wrong.
Different paths for different miners. I run a small 30+ GPU home farm for the past two years. I've made all my investment back and then some. Last year was really good to me. It's been work, but not that hard and yes Very profitable.
The same card that was paid off had another card which broke and then the same card will have to roi for 2 gpus, now imagine if it was 3 gpus that broke, 1 had to pay for 3 or even more, most of the world had no 3 years warranty, most like 15 days warranty hehe, and now officially no warranty at all if gaming gpus were used on mining.
You're accounting and business skills are dazzling. I hope you aren't in business for the sake of those around you. BTW of my 30+ GPUs, not one has failed yet. Sometimes it isn't the equipment, sometimes it's PEBCAK.
Those are things that you trolls fail to see. To me any calculation you trolls do is wrong, most of those gpus used on mining, I'd say 80% of all gpus used on mining were never paid off and to this day are still not and will never be. It's a failed crusade.
Ah Metroid, Metroid, Metroid.... Your stats of 80%... could be right, could be wrong - you are just throwing out BS without support. And that makes YOU the troll.