Jagex trademarked the letters "RS", so they used that as "ammo" for shutting it down (they also shut down RSBot for the same reason a couple of months ago).
It really doesn't make much of a difference, though, because gold4rs just changed their name to gold4(removed), and now they can't legally get their website shut down by Jagex
Just cause they managed to shut down Gold4RS domain doesn't mean GF to the rwt'ers. Theres so many sites and no Jagex did not manage to shut down RSBot. It's now Powerbot, since its allowed w/o the RS