Miners risks are much bigger. Miner has to pay off its expenses and equipment for a maximum of 1 year.Due to running equipment on almost constant 100% percent capacity,miners equipment cant last much sa a ordinary computer.If it holds a year, it is a huge success.It is not coincidence that miners producers give just 6 months og guarantee.Plus new,much more efficent equipment will make it obsolete just after a year.
One example - If a miner is running the best DASH miner SPx36,which costs $7000 per unit,just to pay off its cost in a year,it needs to generate $19.18 of pure profit every day.Now if we add costs of electricity,saying it is using the cheapest available electricity of $0.05,it will cost him additional $5.28 per day.
So,to pay off costs of miner and electricity, just one miner SPx36 will need to make 19.18+5.28 = $24.46 of pure profit every single day !
Now,such miner generates loss of $0.96 every day,so miner with just one SPx36 will generate a loss of for a year of 365x0.96 + 7000 = $7350.4
This example clearly shows how mining DASH for ordinary miners which are not large masternode owners is extremely unprofitable.No ordinary miner will let himself to generate such massive losses. Ordinary miner wants to earn as much as possible with the lowest risk.That is a reason why they are mining only the most profitable coins like BTC and ETH,hugely disregarding others.
When people are talking of DASH masternode profits, talking about masternode today costs of $77000 and how its yearly profit is so low for such of investment is completely wrong. Historic charts clearly show that 4500(90%) of masternodes were established before previous bull run for a cost of max$15000. They were paid off for a many,many times ,so today ,they generates pure profit to its owners and every price above 0 is good for them.