Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.
Well, you asked for the costs of using your computer. If I assume that your computer on averarage uses 300W + 50W for the monitor and 100W for the speakers, you consume a total of 450W (= 0.45KW)
If you use your computer 8h / day you use 3,6kWh. (8*0,45). In Sweden 1 kWh costs roughly 10...