I joined around late 2012, if not early 2013. The game was active.
Suppose there are many factors to FHs sudden decrease, from the hacking in 2016. The use of the login page, to the update with the new maps, and just general people growing up and losing interest as real life got in the way. And of course some things just happen, drama occurs that sours tongues of players that cause them to leave.
I play the FH game occasionally and I do very much miss the activity it once had. I miss roleplaying as a wolf in a pack and working my way through the ranks </3 maybe one day with a future update that really gets talking things will heal.