Forum:Remove from play

When a card is removed from play its effect is not activated right? (Cards that say "send to the graveyard or when this is sent to the graveyard") (like sangan)

What about cards like Gravekeeper's Servant or Dark Crusader? Are thier effects active? If you "send to the graveyard to increase its ATK by 400"

or for gravekeepers servant: when macro cosmos is face up, does your opponent mill? "or send one card to the graveyard which gets removed from play?