It tends to happen with the international fandom more than the fansites. There has been fansite drama before but if it's not discussed publicly then they give off that vibe of being close. Most fansites close abruptly because they've moved onto another group and don't want to say that they did. Taehyung's popular fansite Night Breeze was this case. Some leave for personal reasons and if they do for that reason they usually say so