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.
Just extra heat and possibly more wear on the spindle. But if the spindle is always running and just maintaining velocity, who knows if it's worse then pumping the motor with current and spinning up the drives periodically.
I don't spin down my raids because I don't like the delay and they have been running for 2 years no problems so far.