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.
You don't need to be logged off for the garbage collection of TRIM'd blocks. Just some drive idle time will do it.
Your drive is already over-provisioned 7%. Over provisioning any additional space won't really do anything for you, but will just reduce the amount of available disk space, for no added benefit.