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.
i'm fairly sure apple makes a product called the "AirPort" express or something like that, that allows you to cast from itunes to your stereo over a wireless LAN
You can also pick up an FM transmitter for like 10 bucks from a local electronics store or if you got brave make one yourself for even less probably. A lot cheaper than anything put out by apple.