$0.31 a day after electricty is obviously caculated using the electricity price of 12c/kw, try put 0.06 $/kw in the box at the top of the page, most mining companies or hosted miners will be paying that or even less.
Whats interesting is the KS miners didn't scale very well to lower electricty costs, I think the top one only went up by $3 a day, wheras the BTC miners were very sensitive to it. The S19 XP Hyd for example going from $0.83 to $8.56 per day.
Unfortunately, the electricity cost is not cheap here. Electricity cost depends on the usage of Electricity. So, if I run ASIC miners, I will likely use a lot of energy, and the price of Electricity will increase to $0.15 where I live. Thanks for the info, by the way. Now, I understand that mining is too profitable for those with cheap Electricity.
Kaspa mining is on the rise right now but it is hard to get their asic. I found one or two in my home country but it cost almost twice

I think because everyone has an eye on this product and also bitmain is making it too.
Unfortunately, Kaspa mining won't remain this profitable due to its block reward-reducing system and the number of miners adding to the network every day. The block reward halves once every year and it is reduced every month.