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.
yes, fine, nothing to worry about. Nickle which is used to plate a lot of stuff is fine too. There is a "table of galvanic interaction" table of metals on the net that lists all common metals and the farther apart on the list the more reactive (prone to promoting corrosion) they are and metals that are close to one another on the list are no problem.