This is the first I've heard of it?
There have been many 1000's of people using it without any reported problems for 5+ years now (for HEM and BetPot before that).
I can only read that thread using Google translator, but as far as I can it's just one second hand report from a player given the info from a lowish level Party support worker?
Even on the Unfair Advantage Policy
page they say:
We may email the offender(s) and demand the immediate cessation of all unfair practices;
So it's not something to get a huge panic over.
If Party really do want to prohibit FPHG then they are welcome to contact me via PM or email and I'll lock the thread up and/or pull the FPHG download page, but until we see some kind of reputable report I don't think there is anything really to worry about yet