Here in Denmark we have at least 5 hydrofoil forums, one of them being a windfoil forum and the 4 kitefoil forums
Facebook is used almost entirely nowadays, for almost everything, and most forums are "closed" to avoid spam, to avoid deliberate theft plans, and last but not least to avoid ones family or boss to be able to see where you are ha haa
To discuss foil specific topics of course
Eventhough regarding WHERE you want to go out and when, big general facebook (still closed of above reasons) groups are used - as very often we ride different types (TT, Wave, Hydrofoil) together and company is always good as the major problem is to avoid going out alone - which happens too often unfortunately...
And when talking about kite sizes in these big forums, we just add "hf" in the text, so noone gets confused if they only got a TT f.ex.
It also spreads the word much better, so now more and more get into foiling - GREAT !!!