Better to use whattomine.com then a web page that doesnt bother to consider power in roi. plus a lot of the info on that page is old 2019..is a long time ago in crypto. And the prices are comical...as if you could touch a 3070 for $570....bwhahhaha....not for a while you wont....
Whattomine.com is great and yes, the article from above doesn't count in the electricity price, which should definitely be taken into account.
But, the page itself is up to date(those profits are from yesterday).
And the prices aren't comical- probably depends on where you live but here you can buy NVIDIA RTX 3070 for $800 right now, new and with 3 years of warranty. Have no idea where you got $570...