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.
An X800Pro has a chance of softmodding into a 16-pipeline card, effectively an underclocked version of the X800XT/PE. I am not sure whether or not there is a sticky for this, but remember that it is a chance. I am sure you could do the same with an X850 Pro, though I have yet to see one myself.
Edit: Short version to answer your question:
Yes, I am sure an X850Pro has as much chance of modding as an X800Pro.