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've got about 16 hours in it (solo) and I think I've seen most of the current content. I don't recommend the game for most people. It might be great for keeping children busy for a while.
Most of the content is tedious rather than rewarding after the magic of building a bigger train wears off. I'd wager multiplayer would make the experience better but wouldn't make the game better.