"What if that was your daughter who got something thrown at them, you definitely would not have liked that and I'm sure this girls parents wouldn't like you throwing stuff at their poor daughter.
"YOU GO GIRL, spend that $50 on yourself because you deserve it."
The girl's father replied to the post, thanking Jade and her boyfriend for the kind gesture.
"I would like to say thank you for your generosity," he wrote.
"My daughter was over the moon when you did this. Yes, she had a bad night and we did discuss this.
"But she just wants to do her job and move on, but you made her day. Once again thank you from the bottom of our hearts.
"Like she said to you last night that you didn't have to.
"Just wish there were more people in the world that were more caring towards retail workers especially the younger generation."
A furious customer threw a drink at a young worker in a Sydney McDonald's on Saturday night. Photo / Getty Images
Other commenters praised Jade's actions in supporting the young hospitality worker.
"A beautiful thing for you both to do I hope the young girl is OK and you made her night a better one heart of gold you both have," a woman responded.