Alice the Bully comes to you and says "I'll clobber you unless you give your lunch money." You give her your money to avoid the beating.
A few minutes later, Bob the Bully comes to you and says "I'll clobber you unless you give your lunch money." Do you think telling him that you already gave it to Alice will help at all?
No.
Let's say you have two Indulgent Tormentor on the battlefield, and it's the beginning of your upkeep. Each Tormentor's ability goes on the stack. One of them resolves.
draw a card unless target opponent sacrifices a creature or pays 3 life.
The opponent you targeted now chooses to sacrifice a creature, to pay 3 life, or to do neither. Then he either sacrifices a creature, loses 3 life or you draw a card. It doesn't matter what other creatures he might have sacrificed or what other life he payed earlier in the game.
Then the other ability resolves.
draw a card unless target opponent sacrifices a creature or pays 3 life.
The opponent you targeted now chooses to sacrifice a creature, to pay 3 life, or to do neither. Then he either sacrifices a creature, loses 3 life or you draw a card. It doesn't matter what other creatures he might have sacrificed or what other life he payed earlier in the game.