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.
For the price, they are hard to beat for CFM to noise, they are made by the same oem that makes the Nexus fans. They are without a doubt better fans out there, but good luck finding some that are in the 4-5 bucks range, the Slipstream fans to me are the only other that are really worth a look at, but will run you about 7.50 a fan, however they by far out perform the YL fans. And have become my default choice when buying case fans that will not be horizontally mounted.